The Kollegienhaus of the University of Basel is situated on the Petersplatz close to the historic city center of Basel (see map).
From the railway station Basel SBB (for travellers from abroad, especially Germany, please note there is a second railway station in Basel called «Basel, Badischer Bahnhof»), your best option is to take the bus 30, direction «Basel, Badischer Bahnhof», until the bus stop “Spalentor” (if you got out at Basel Badischer Bahnhof, you can also take the bus 30, but in direction Basel SBB).
Alternatively, from the railway station Basel SBB, you can also take the tramways 11 (direction «St-Louis Grenze») or 8 (direction «Weil am Rhein») and get out at the tramway station “Marktplatz” and go from there to the Petersplatz by foot. All information on Basel public transport system (Map, Schedule, fares) can be found here
Finally you can also go by foot from the railway station. It should take you 20-30 minutes to reach the Petersplatz.
The Kollegienhaus of the University of Basel