About Trisonia
Trisonia brings the concerts on the Upper Rhine together in one place: in Basel, Lörrach, Freiburg, the Ortenau, Karlsruhe, Baden-Baden, Colmar, Mulhouse, Strasbourg and northern Alsace – three countries, one region, one list.
At a glance
- Trisonia is a free concert calendar for the Upper Rhine region in Germany, France and Switzerland, in German, French and English.
- The area covers five regions: Basel and surroundings, Freiburg and surroundings with southern Baden, the Ortenau, Karlsruhe and surroundings with Baden-Baden, and Alsace from Mulhouse and Colmar via Strasbourg to northern Alsace.
- Trisonia currently lists 2427 upcoming concerts at 657 venues.
- The programmes are collected anew every morning. Last updated: Wednesday 4 November 2026.
- Sources: the websites of 20 venues and the platforms Reservix, SoTicket, DATAtourisme, PETZI, Eventfrog.
- Trisonia does not sell tickets; it links every concert to the venue or platform.
- Trisonia is a private, non-commercial project from Freiburg im Breisgau, without ads and without tracking.
The idea
If you live on the Upper Rhine, you have clubs, concert halls and festivals in three countries within reach. But the programmes are scattered across many websites, and hardly anyone looks across the border. Trisonia collects them once a day and presents them clearly: who’s playing where and when, filterable by region, genre and date.
Where the concerts come from
Every morning Trisonia reads the public programmes of 20 venues directly from their websites. On top of that come the platforms Reservix, SoTicket, DATAtourisme, PETZI, Eventfrog: Reservix for southern Baden, the Ortenau and Karlsruhe, SoTicket for halls around Strasbourg and in Mulhouse, DATAtourisme for the rest of Alsace, PETZI for Basel music clubs and Eventfrog mainly for Basel.
Every concert links to the venue’s or platform’s page. That’s where you’ll find the definitive details and the tickets.
What Trisonia doesn’t do
- No tickets: we sell nothing and earn nothing from tickets.
- No AI when you use it: search and filters work without a language model.
- No ads, no tracking, no accounts.
Subscribe
Every selection on the home page is available as a calendar to subscribe to, and the newly announced concerts as a feed. Go to the concerts
Data for apps and AI assistants
AI assistants and apps can query the concerts directly: Trisonia offers an MCP server (Model Context Protocol). It is read-only and needs no login.
- MCP server
https://www.trisonia.eu/mcp- Tools
- search_concerts (concerts by period, region, genre, venue and search term), get_concert (one concert), list_venues (all venues)
- Calendar subscription
- https://www.trisonia.eu/en/calendar.ics
- Newly announced (Atom feed)
- https://www.trisonia.eu/en/new.xml
- Overview for language models
- https://www.trisonia.eu/llms.txt
Calendar and feed can be narrowed down by region, genre and venue on the home page. When quoting, please link to the concert's page.
Who’s behind it
Trisonia is a private, non-commercial project from Freiburg. Is a venue missing, is something wrong, or would a venue rather not be listed? Write to us.
How Trisonia is built
Software, map, typefaces and server: Technology