Protistology Open 2026 April 19 - 23, 2026 (Prague, Czech Republic)

Register

Posters should be A0 (portrait orientation)

Talks should be 12 mins + 3 mins discussion

Invited talks 25 mins + 5 mins discussion

Download the programme (PDF)
Download the abstract book (PDF) (for registered participants only)
Download the posters and participants list (XLSX) (for registered participants only)

The offline programme and abstract book were created on April 10, 2026. They will not be updated further. All programme changes will be reflected in the interactive online programme only, so please refer to it for the most up-to-date version. Only minor changes within sessions are expected due to unforeseen last-minute cancellations. For your convenience, changes are also specified below:

- April 22: section 4B: Cancellation of a talk presented by Seda Mirzoyan: Comprehensive analysis of the types and distribution of mitochondrial RNA editing in the phylum Heterolobosea*

- April 22: section 4B: Cancellation of a talk presented by Joao Alcino: Mitochondrial RNA editing in Arcellinida (Amoebozoa)*

- April 22: section 4B: The talk of Yuji Inagaki (“Draft nucleomorph genome of the dinoflagellate strain TGD”) has been rescheduled to start at 9:45.

- April 21: Cancellation of the poster presented by G. Langlois; addition of a poster by Jacob Luo (poster ID 5).

- April 22: Change of speaker in Session 4B (9:30); the talk will be presented by M. W. Brown.

- April 19: JEM Editorial Board meeting added (date of change: April 15)

- April 19: Location of registration desk changed (date of change: April 15)

- April 22: Times and halls of society meetings changed (date of change: April 15)

- Session 1B: Talk by Awakash Soni removed; start times of the two talks in the session changed (date of change: April 12).

 

  April 19
10:00-19:00 Registration (Congress Hotel - Entrance hall, close to reception)
12:30-16:30 Mentoring Event (Congress Hall, Grant Hotel International)
Mentoring Event
12:30–13:00 Doors Open & Coffee
13:00–13:10 Welcome & Introduction
13:10–14:10 Round Table Discussions
14:10–14:30 Break & Preparation for Table Reports
14:30–15:45 Table Reports & Concluding Remarks
15:45–16:30 Open Networking & Informal Discussions (with drinks)
17:30-19:30 Welcome drink (Congress Hotel - Foyer of Congress hall)
   
  April 20
7:30 Registration
8:30 Opening ceremony (Congress Hall)
9:00 David Montagnes: Why are we here? (Congress Hall)
9:30 Victor Tobiasson: On the Dominant contribution of Asgard Archaea to Eukaryogenesis (Congress Hall)
10:00 Ramon Massana: Incorporating uncultured protists into ecological and evolutionary studies (Congress Hall)
10:30 Coffee break (and poster mounting)
11:00 The Symbiotic Continuum across the Tree of Life (ISOP-sponsored symposium; Congress Hall)
The Symbiotic Continuum across the Tree of Life
11:00 Bonacolta & Coots: Introduction for The Symbiotic Continuum across the Tree of Life
11:10 Coots: Lessons from the "Professionals": The Retarian Photosymbiosis
11:25 Pomahač: A novel mitochondrion-related organelle and complex endosymbiosis in a rare anaerobic ciliate*
11:40 Moeller: How (can) photosymbioses become permanent? Innovations and limitations in kleptoplastidic systems
11:55 Gile: The domesticated protists of termites
12:10 Bonacolta: Apicomplexan symbioses in the hot seas
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
12:30 Conference photo (garden)
12:40 Lunch
14:00 Kleptoplasty: Living Between Feeding and Photosynthesis (ISOP-sponsored symposium; Congress Hall)
Kleptoplasty: Living Between Feeding and Photosynthesis
14:00 Cruz: Kleptoplasty in sea slugs: benefits of hosting chloroplasts
14:15 Pinko: Long-Term Functional Kleptoplasty in Foraminifera: Linking Algal Symbiosis and Chloroplast Sequestration Evolution*
14:30 Johnson: Evolutionary dynamics of kleptoplasty in Mesodinium ciliates resembles parasitism
14:45 Garcia-Cunchillos: Communicating with stolen chloroplasts: host contributions to transient integration in Rapaza viridis
15:00 Sørensen: Uncovering the complexities of Meringosphaera Endosymbiosis
15:15 Decelle: From Symbiont to Organelle Donor: The hidden life of the microalga Phaeocystis in the Ocean
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
15:30 Coffee break
16:00 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 1A - Microbial Interactions (I) session 1B - Trypanosomatids session 1C - Apicomplexa
16:00 Karnkowska: Multilayered inference of protist interactions in freshwater lakes of NE Poland Zoltner: An updated map of the trypanosome nuclear pore complex provides mechanistic implications for nuclear export Ralph: High-res imaging of Plasmodium feeding reveals the mechanism for resistance to the antimalarial artemisinin
16:15 Piwosz: An unexpected importance of omnivorous protists in a coastal marine microbial food web Sveráková: ETC composition and membrane potential maintenance in non-canonical Trypanosomatids. Dzikowski: Getting In to Get Out: Alternative Pathway for Red Blood Cell Modifications by Plasmodium Parasites
16:30 Egelund Andersen: Protists introduce distinct temporal patterns in a bacterial Syn-Com consistent with known feeding traits* Wong: Distinct roles of three Oxa1 insertases in Trypanosoma brucei revealed by submitochondrial proteomes* Šujanová: Tissue-specific exo-erythrocytic development of Haemoproteus parasites in Sylvia atricapilla
16:45 Doležal: SPARC Expedition: Protist Communities in Marine Sediments off the Rio de la Plata Yurchenko: Callunene, mitophagy, and flagellum removal in trypanosomatids Sojka: Protease and CDPK signaling networks govern invasion and egress in Babesia divergens
17:00 Dünn: Islands in the Abyss: High Endemism and Depth-Stratification in Deep-Sea Protist Communities Pendlebury: Novel kinetoplast proteins regulate kDNA replication and segregation in Trypanosoma brucei* Chelaghma: Protein targeting to the plastid in Apicomplexa is via an autophagy-derived pathway*
17:15 Herzog: Effects of different P. parvum clade strains on selected target organisms and their cellular surfaces* Trainer: Species Discovery of Marine Gregarine Parasites in Southern California*
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
17:30 Poster session I (60 posters; Bivoj, Přemysl, Foyer, Bruncvík, Libuše)
18:00-19:15 Meeting of JEM Editorial Board (Congress hall)
19:00-22:00 ISOP-sponsored Student Night (only for student ISOP members) (The Pub Dejvice)
   
  April 21
8:30 2026 ISOP Hutner award winner announcement and 2025 ISOP Hutner award winner talk by Javier del Campo (Congress Hall)
9:20 Grell prize winner talk (Society for Eukaryotic Microbiology): Jule Freudenthal and Alejandro Berlinches de Gea (Congress Hall)
10:00 ISOP Past President lecture by Sina Adl (Congress Hall)
10:30 Coffee break (and poster mounting)
11:00 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 2A - Evolution of Eukaryotes (I) session 2B - Symbionts and organelles (I) session 2C - Parasites and Viruses
11:00 Lamza: Reconstructing the earliest steps in protist evolution Cadena: Origins and Molecular Mechanisms of the Host-derived Endosymbiont Division Machinery in Angomonas deanei* Pažoutová: With or Without You: Tracking Gut Microbiome Dynamics During Long-Term Blastocystis Colonization*
11:15 Brown: A soil amoeba that herds prey and sequesters resources using a multicellular feeding strategy Slamovits: Dissecting interactions between marine bacteria and a heterotrophic dinoflagellate Zimmann: Predatory Trichomonas vaginalis: A Protist's Implications for Vaginal Microbiota Dynamics
11:30 Méndez Sandín: Environmental phylogenetics supports a steady diversification of crown eukaryotes since the mid Proterozoic Hadjicharalambous: Bacterial epibiont defends ciliate host through self-sacrifice. Fiala: Anthropogenic disturbance reshapes freshwater parasite communities revealed by eDNA metabarcoding
11:45 Porfirio de Sousa: From Fossils to Phylogenomics: Illuminating Arcellinida (Amoebozoa) Evolution Through Deep Time Tashyreva: Multiple euglenid-bacterial endosymbiotic relationships uncovered Ghai: Cultivation, genomics, and giant viruses of a ubiquitous and heterotrophic freshwater cryptomonad
12:00 Cho: The Evolutionary Precursor of Eukaryotic Chromatin Tymoshenko: Inside Paramoeba: Genomic, Metabolic, and Cell Biological Foundations of a Tripartite Symbiosis* Vieira: An ensemble of phylogenetically related giant viruses implicated in cryptophyte bloom collapse
12:15 Bernabeu: Eukaryotic gene ancestries reveal that eukaryogenesis happend in a microbial-rich environment* Haro: Paramoeba holobiont genomics: from kinetoplastid and Gammaproteobacterial endosymbionts to Asgard-derived gene Kostygov: RNA viruses in Trypanosomatidae: diversity, origins, and evolution
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
12:30 Lunch
14:00 Plenary talk (F. Söderbom: Non-coding RNAs in social amoebae: role in development and multicellularity?)
14:30 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 3A Advances in Protist Genomics and Phylogenomics session 3B - Symbionts and organelles (II) session 3C - Molecular Biology
14:30 Grigoriev: Expanding Protist Genomics with JGI Hollender: Single-cell freshwater protist screening reveals novel symbionts across Rickettsiales diversity* Pergner: Ribonucleotidyl transferases of the TRF family are involved in plastid transcript splicing in Euglena gracilis
14:45 Warring: A pipeline for high-throughput single-cell sequencing of protists from environmental samples Palka: Symbiotic bacteria in ploeotid euglenids reveal an independent route to living in low-oxygen environments* Llopis Monferrer: Exploring Silicon transport in deep-sea Phaeodaria
15:00 Brabec: Microfluidics-free high-throughput single-cell trancriptomics of a free-living Diplomonad Valt: Cryptic complexity: The unconventional energy metabolism of Solarion arienae* Lu: Exploring the role of adaptin protein complexes in haptophyte calcification*
15:15 Jones: PhyloFisher v2: Advancing Accuracy and Reproducibility in Deep Phylogenomics Walraven: Single-cell genomics and fluorescence microscopy indicate permanent plastid in a marine Centrohelid* Johánková: Giardia, do you GET that? Rewiring of a Conserved ER Targeting System*
15:30 Nonell Remedios: Using single-cell genomics to generate high-quality genomes of uncultured protists* Probert: A new example of endosymbiotic plastid acquisition: description of Chrysothecomonas (Thecofilosea, Cercozoa) Kingdon: Evolution and function of alpha-giardins*
15:45 McFadden: Gene drives: powerful new tools to alter the genomes of protists Li: Computational Insights into the Complexity of Protein Targeting to Dinoflagellate Plastids* Fantini: Encapsulation of microbial eukaryotes
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
16:00 Coffee break
16:30 Poster session II (60 posters; Bivoj, Přemysl, Foyer, Bruncvík, Libuše)
18:00-19:00 ISOP Annual Membership meeting (Congress Hall)
   
  April 22
8:30 Alexandra Worden: Friends and enemies in protistan interdomain relationships (Congress Hall)
9:00 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 4A - Molecular and Cell Biology session 4B - Protist Genomics session 4C - Photosymbioses and Algae
9:00 Waller: Perkinsus as a powerful model for ancestral state reconstruction in both dinoflagellates and apicomplexans Mathur: Long-read genome sequencing illuminates transitions to parasitism in oomycetes and bigyromonads Chwalińska: Freshwater photosymbiotic ciliates – complex systems reconstructed with single-cell genomics*
9:15 Flores: A tale of two genomes: hybrids in protists and the imbalanced homeolog transcription in Perkinsus chesapeaki Tice: CSI-SSU: Phylogenetic contamination screening of genomic datasets, demonstrated on the Protist 10,000 Genomes Toullec: Shedding light on photosymbiosis using 3D electron microscopy
9:30 Iorillo: Complexome profiling reveals composition of respiratory complexes and mitochondrial ribosomes in the myzozoan* Brown: The First Genome of Cryptodifflugia operculata Reveals Phylogenomic Insights in Arcellinid Testate Amoebae* Asghar: Protist community dynamics during the summer phytoplankton bloom in a freshwater meso-eutrophic reservoir*
9:45 Ganser: Solving the Long-Standing Mystery of the Tintinnid Lorica Inagaki: Draft nucleomorph genome of the dinoflagellate strain TGD Martos: Clade specific trophic behaviour of the uncultured Picozoa group in the Mediterranean Sea*
10:00 Laeverenz-Schlogelhofer: Mechanosensory behaviours in Tintinnids Alcino: Mitochondrial RNA editing in Arcellinida (Amoebozoa)* Pilátová: Organic biocrystallization in microbial vision in Symbiodiniaceae
10:15 Eliáš: Comprehensive analysis of small GTPases in Microsporidia reveals new extremes in eukaryotic cell biology Mirzoyan: Comprehensive analysis of the types and distribution of mitochondrial RNA editing in the phylum Heterolobosea* Genot: Just The Two Of Us? Two Distinct Green Algae Are Associated With The Japanese Black Salamander’s Eggs
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
10:30 Coffee break
11:00 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 5A - Evolution of Eukaryotes (II) session 5B - Chrompodellids and dinoflagellates session 5C - Taxonomy and diversity (I)
11:00 LAFUENTE SANZ: Exploring hidden splicing diversity in marine protists through long-read metaomic data* Silberman: Making of a Model Organism – Discovery and Description of Colpodellids (Apicomplexa) that Eat Prokaryotes Jiménez Valadez: The environmental distribution and diversity of previously unknown lineages of unicellular Holozoa*
11:15 Butenko: Revisiting the spliceosome evolution: insights from protists Kolisko: Genomic and Transcriptomic Insights into a Novel Bacterivorous Colpodellid Carmona Rivas: Chasing the comet’s tail: in-situ characterization of a new unicellular relative of animals in marine samples*
11:30 Francis: Quantified expansions and reductions of eukaryotic protein complexes Oborník: Chromera velia converts exogenous glycine to sugars only under heterotrophic conditions in the dark José: Morphological and molecular characterization of a novel aphelid infecting Nannochloropsis cultures*
11:45 Gahura: Pan-eukaryotic survey of mitochondrial ribosomal proteins reveals major trends in mitoribosome evolution Gruber: Crystalline guanine packed within vacuoles serves as nitrogen store in Chromera velia Weston: Ultrastructure and phylogenomic analysis of Neocolponema saponarium, a deep branching free-living alveolate*
12:00 Pánek: Gene duplication, protein retargeting, and horizontal transfer in the evolution of mitoribosomes Mozo: Phylogenomics of coral photosymbionts and their free-living relatives* Swichtenberg: Exploring the diversity of Metamonada with an emphasis on termite-associated taxa*
12:15 Tachezy: Unveiling Anaerobic Peroxisomes: Co-Evolution with Mitochondria in Neocallimastix lanati Krause Massaguer: Isolation, Culturing and Characterization of Protist Symbionts from Mediterranean Corals* Soviš: A peek into the diversity of Nyctotheridae (Ciliophora: Armophorea)*
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
12:30 Lunch
14:00 Mariusz Nowacki: Epigenetic mechanisms of genome regulation in Paramecium (Congress hall)
14:30 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 6A - Cell Biology, Genetics, and Epigenetics session 6B - Parasitic protists session 6C - Symbionts and organelles (I)
14:30 Simon: Uptake of exogenous dsRNA in Paramecium: components and overlaps to endogenous RNAinteference Dumack: Diversity and Ecology of diatom-parasitic Cryomonadida (Cercozoa, Rhizaria) Nicolas-Asselineau: Loss of aerobic mitochondria in Prostomatida ciliates associated with respiratory endosymbionts*
14:45 Drews: Pol II Transcription and Epigenomic Regulation in Paramecium tetraurelia Gachon: Seaweed aquaculture: a crossroad where algal holobionts meet protistan parasites, biocontrol and conservation Zhuang: Symbiotic systems in anaerobic ciliates: insights from two Tropidoatractus species
15:00 Potekhin: A formidable challenge of Paramecium hybrids: Two nuclei and too many chromosomes Thomé: Arctic phytoplankton dynamics are impacted by chytrid fungi* Mendez-Sanchez: Hidden diversity and symbioses in the anaerobic ciliate class Odontostomatea
15:15 Okolie: New insights into the osmoregulatory strategies in the halophilic ciliate, Schmidingerothrix salinarium* Miebach: A fungus living the protistan highlife: novel insights into the curious biology of Paraphysoderma sedebokerens Koštířová: Freshwater-to-Marine Transition Triggers Methanogen Loss in Anaerobic Ciliate Symbiosis*
15:30 Dacks: Contractile Vacuoles evolved in parallel across eukaryotes Lüttich: Hidden in the Deep - Parasitic protists in Arctic Deep-Sea macrozoobenthos* Botero: Starvation Reveals Core Bacterial Symbionts of Ruminal Ciliate Protozoa*
15:45 Obiol: Genomic and transcriptomic insights into phagocytosis in heterotrophic flagellates Ritchie: The morphology and life cycle of the facultative parasite Philaster sp. isolate FWC2* Zeller: Methane emissions of anaerobic ciliates are size and endosymbiont dependent*
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
16:00 Coffee break
16:30 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 7A - Subcellular Proteomics session 7B - Taxonomy and diversity (II) session 7C - Microbial Interactions
16:30 Salas Leiva: Deep learning of protein correlation profiling data for subcellular compartmentalization classification Packer: Microscopy and Phylogenomics of Novel Deep-Branching CRuMs* Wellinger: Community Assembly of Cercozoa Along a Gradient of Agricultural Management Intensity*
16:45 Pyrih: A Comprehensive Subcellular Atlas of Naegleria gruberi Proteome Reveals Early Eukaryotic Complexity South: Targeted approaches identify novel environments for microsporidia and their relatives* Bludau: A Tale of Two Habitats: Diverging Microbial Stress-Responses in Water and Sediment*
17:00 Hammond: Using subcellular proteomics to investigate bacterial endosymbiosis within trypanosomatids Díez González: Characterization of novel breviates (Amorphea: Breviatea) with unexpected morphology* Radtke: Freshwater and sediment host distinct but overlapping communities, with sediment less affected by wastewater*
17:15 Shinde: Mannose 6-phosphate dependent lysosomal biogenesis in Trichomonas vaginalis Knotek: When Diagnostic Characters Fail: Temperature-Dependent Scale Morphology in Mallomonas* Wagenhofer: Microplastics at the base of aquatic food webs: The role of heterotrophic protists*
17:30 Havelka: The mitochondrial organelle of the free-living diplomonad Hexamita inflata: the case of a missing hydrogenase* Nguyen: The Abundance and Distribution of Wood Digestion Enzymes in Termite-Associated Protists* Lenders: On a Different Track: Tire Wear Particles Drive Distinct Biofilm Assembly Compared to Defined Polymers*
17:45 Jirsová: Evolutionary Rewiring of Vesicular Transport in Tetrahymena Zeman: Novel flagellar architecture and unusual life cycles: Probing Trypanosomatid diversity in flies (Diptera)* Uroosa: Concentration-Dependent Effects of Bacteria-Sized Microplastics on Hetero-trophic Nanoflagellate Communities*
* An asterisk at the end of a presentation title indicates that the presenting author is a student.
17:30-19:00 Society of Eukaryotic Microbiology (Přemysl)
18:00-18:45 Czech Society for Parasitology (Bivoj)
18:00-19:00 Italian Society of Protistology (Libuše)
18:00-19:00 Protistology Nordics (Bruncvík)
19:00 Banquet, ceremonies (Congress Hall and its Foyer, Garden)
   
  April 23
   
9:00 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 8A - Biochemistry, Cell and Molecular Biology session 8B - Euglenids and Diplonemids session 8C - Taxonomy and Diversity (III)
9:00 Dorrell: Functional probing of chromalveolate green genes: a suspicious plastid ATP synthase Tomečková: From Order to Chaos: Disrupted Pellicle Pattern in Euglena gracilis Petroni: Next Generation Taxonomy of Ciliophora: Capacity Building, Resilience and Global Integration
9:15 Peña-Diaz: Two SUF systems, two life strategies: functional diversification of parallel pathways Arndt: Lifting the curtain on the sequence diversity of benthic diplonemids in deep-sea benthos Serra: Building Expertise through Mobility: Next Generation Taxonomy of Euplotes eurystomus from Ethiopia
9:30 Hashimi: MICOS coordinates election transport chain biogenesis and membrane elaboration during crista maturation Faktorová: Paradiplonema papillatum – creating a new experimental model pays off Sonntag: Beyond barcodes: does ciliate morphology still matter?
9:45 Kořený: Reinventing heme biosynthesis: A new mode of assembly in marine parasites Prokopchuk: Mechanical properties of DNA drive selection in expanded mitochondrial genomes of marine diplonemids Utz: Is the Composition of Communities in Bromeliad Water and Adjacent Soil Similar?
10:00 Schulberg: Eukaryotic Nitrate Dissimilation Supports Phytoplankton Survival under Anoxia Lax: An expanded multigene phylogeny of phagotrophic euglenids using single-cell transcriptomes Reñé: Exploring the diversity of amoeboid protists in coastal sediments from the NW Mediterranean Sea
10:15 Füssy: Harvesting picomolar iron: blue copper ferritins at the core of nutrient homeostasis in marine algae? Simpson: A revised understanding of petalomonad diversity (Petalomonadida; Euglenida) enabled by a cultivation approach Vo: Discovery and Characterization of a New Marine Nanoflagellate Cafeteria calypsium sp. nov.
10:30 Coffee break
11:00 Parallel sessions (A:Congress Hall; B:Bruncvík; C:Libuše)
session 9A - Advanced Morphology of Protists session 9B - Dinoflagellates session 9C - Taxonomy and Diversity (IV)
11:00 Mikus: An atlas of eukaryotic ultrastructure Zerdoner Calasan: Dating the Evolution of Dinophyta: A Transcriptome-Based Phylogenetic Framework for a Fossil-Rich Lineage Chen: Molecular diveristy of Pseudo-nitzschia species revealed by strain-resolved high-throughput sequencing
11:15 Sturm: Flow Imaging Microscopy in the Protist Analysis Toolbox: Integrating FlowCam into Diverse Analytical Workflows Nisbet: Establishing genetic modification tools in dinoflagellate algae Gong: New insights into the taxonomy and diversity of the genus Poterioochromonas (Chrysophyceae)
11:30 Mitchell: Which species matter, how reliably are morphological identifications, and can IA help? A case study on the use Cooney: Exploring dinoflagellate-cyanobacterial partnerships to understand how the path to organellogenesis begins Skaloud: Trait-resolved eDNA metabarcoding reveals rapid morphological dynamics in Synurales
11:45 Kiørboe: The functional diversity of the flagella of free-living protists Maciszewski: Recent plastid replacement in Karlodinium ballantinum challenges the paradigms of endosymbiotic gene transfer Barcyte: Defining Eustigista, a new superclass of ochrophyte algae
12:00 Suzuki-Tellier: Predation with a vaned flagellum and groove: from 'typical excavates' and beyond Barbrook: Spontaneous Evolution of Heterotrophy in Dinoflagellates – Minicircle Loss in Symbiodinium microadriaticum Graf: Culture free methods and environmental data to explore the diversity and ecologiy of oceanic chrysophytes
12:15 Eglit: Exploring the super-resolution structure of cell division in Meteora sporadica Takahashi: Multiple origins of plastid genome in one dinoflagellate species suggest incorporated cytological entities Prokina: The poorly characterized cercozoan order Discocelida exhibits an ancestral flagellar apparatus
12:30 Lunch
   
   
  April 24 Conference trip (Karlštejn, optional)
  (The bus is provided by the conference; participants will only need to pay the entrance fee to the castle. Conference participants and their companions can register for this optional trip at the conference registration desk (April 19 and April 20) on a first-come, first-served basis.)
9:00 Bus departs from the Grand Hotel International
9:50–10:45 Walk to Karlštejn Castle
11:00–11:50 Guided tour of Karlštejn Castle
12:30 Bus departs for the Grand Hotel International
13:30 End of the trip (Grand Hotel International)