We're in Prague
GNU Tools Cauldron 2026 is in Prague, Czechia!
The 2026 edition of the event for GNU Toolchain developers will be hosted in the city of Prague over the weekend of 2 to 4 of October.
Date and Location
Fri-Sun, October 2-4, 2026.
Charles University, Prague, Czechia
Department of Maths and Physics
Malostranske Namesti 25
118 00
Praha 1
Openstreet Map · Google Maps
Social Events
Thursday, October 1 — Welcome gathering at Andělský Pivovar, a restaurant and small brewery
- Our reservation starts at 19:00, but the restaurant is open earlier, so people arriving before 7pm can also meet there. It stays open until midnight.
- Andělský Pivovar, Lidická 337/30, Prague 5 – Anděl
- OpenStreetMap · Google Maps
- From Malostranské náměstí, take tram 12 or 20 directly to Anděl; the journey is only a few stops. Andělský Pivovar is then a short walk from the tram stop.
- If the food at the brewery is not to your taste, there are many other restaurants within a few minutes' walk around Anděl. Some possibilities are Modrý Zub Anděl for Thai food, Pizza Coloseum – Zlatý Anděl for Italian food and pizza, and Old Hanoi for Vietnamese food.
Friday, October 2 – 6:30pm Evening reception and dinner at Staro Pramen Brewery
- Staro Pramen Brewery (Visitor Center), Pivovarská 9 150 00 Praha 5
- https://www.centrumstaropramen.cz/
- OpenStreetMap · Google Maps
Travel
International travelers can arrive to Prague via the Vaclav Havel Airport Prague (PRG).
Accommodation
The conference venue can be conveniently reached by the public transport, either by Metro (subway, underground train) line A (green line), to the station of Malostranská and then by a short walk, or by the tramway lines No. 12, 20 or 22 to the stop of Malostranské náměstí. The tramway stop is situated right across the square to the conference venue. A public traffic schemes can be downloaded at http://www.dpp.cz/en/transport-around-prague/transit-schematics/.
Because of the location just in the center of Prague, it is easy to check lodging options on common booking sites, like http://www.marys.cz/.
Registration
Please head to GNU Tools Cauldron 2026 Tickets to register.
The registration fee is 80 GBP.
We want to enable as many people as possible to attend the GNU Tools Cauldron and if the ticket price is a limiting factor please reach out to the organizing committee.
Organizers
Organizing committee:
You can reach the organizing committee at organizers@gnu-tools-cauldron.org
- Gomathi Anandan
- Jeremy Bennett
- Tobias Burnus
- Richard Earnshaw
- David Edelsohn
- Jan Hubička
- Jose E. Marchesi
- Simon Marchi
- Cupertino Miranda
- Carlos O'Donell
- Elena Zanonni
Event co-organized by the Center for Discrete Mathematics and the Computer science institute of Charles university.
- DIMATIA (Center for Discrete Mathematics, Theoretical Computer Science and Applications)
- IUUK (Computer science institute of Charles university)
Event Sponsors
Thank you to the Center for Discrete Mathematics and the Computer science institute of Charles University for co-organizing the event!
- DIMATIA (Center for Discrete Mathematics, Theoretical Computer Science and Applications)
- IUUK (Computer science institute of Charles university)
Thank you to Pretalx and Pretix for their generous discounts and service hosting!
Pretalx – Conference event software
Pretix – Conference ticketing software
If you would like to sponsor the event please reach out to sponsoring@gnu-tools-cauldron.org
Invitation or Support Letters
The GNU Tools Cauldron will provide formal invitation letters to attendees who request them. If you need documentation beyond registration receipts for your organization to approve of your attendance at the GNU Tools Cauldron 2026, please contact the organizing committee.
If you need a letter for your visa application, we can provide a support letter that you can submit with your visa application. Our visa letters typically include date and location of the event and any speaking roles. Visa support letters are provided 3-5 business days after you have confirmed and paid for your registration. If you need a visa support letter, please start by contacting the organizing committee to initiate the process, but please do not provide any personally identifying information until requested.
Attendance Grants
The GNU Tools Cauldron is committed to the event being inclusive. The cost of the tickets should not be a blocker to attendance. If it is please email organizers@gnu-tools-cauldron.org.
Travel Grants
The GNU Toolchain Fund sponsors developer travel to attend the GNU Tools Cauldron. Travel grants cover some or all of travel-related expenses.
Individuals should email information about their participation in the GNU Toolchain, interests, experience, an estimated budget, and any sponsors in the GNU Toolchain community to organizers@gnu-tools-cauldron.org
The deadline to submit a request is 31 July 2026 (~60 days before the conference).
Additional information for the travel grant process is documented here: https://gcc.gnu.org/wiki/GNUToolchainFund
Code of Conduct
The event is covered by our Code of Conduct here.
Please email the GNU Tools Cauldron Code of Conduct Committee for any code of conduct violation reports.
Media Consent
Registering for the conference implies giving consent to be recorded if the speaker has not opted-out of recording the talk.
Data Protection
Information collected during the call for proposals process will be held in compliance with GDPR regulations. It will only be used for purposes directly connected with organising the GNU Tools Cauldron 2026 and will be destroyed once it is no-longer needed. The personal information we hold on you is your name, email address, affiliation, dietary preferences, T-shirt size. The data is held securely on outsourced secure servers where the data is encrypted.
- The Data Controller is GNU Tools Cauldron CIC.
- The Data Officer is Jan Hubicka honza.hubicka@gmail.com, on behalf of the GNU Tools Cauldron CIC.
Please contact the Data Officer if you would like to know the information we hold on you, wish to have that information amended or deleted, or for any other queries related to GDPR.