The lectures of the school will take place in the room M104 of the mathematical department (see the map here: osm.org/go/0JHG141wV= ) which is located a few rooms to the right after you enter the building on the first floor (note that there is an entrance on the ground floor close to an underground parking).
Regensburg is a historical city with its medeival center being a part of the UNESCO World Heritage. The tours to the Thurns&Taxis castle and the Altes Rathaus are highly recommended to those who are interested in history.
Close to Regensburg is Walhalla, a spectacular hall of fame of the distinguidhed people of the German history that is located on the picturesque site of the Danube.
If you arrive to Regensburg on 10.09 or 11.09, you can also visit Dult, the local beer festival (very similar to Oktoberfest) that takes place in Dultplatz.