Tag der offenen Tür Nürnberg

In the organizer's words:

Every two years, the city of Nuremberg organizes an Open Day on a weekend in October. The look behind the scenes gives you an insight into the diversity of public and private institutions in Nuremberg. Over 100 city departments, authorities, institutions and associations take part in the three-day program from Friday to Sunday. The town halls are open on Sunday. A central event takes place on the main market square on Sunday. Admission is free of charge. You must register in advance for some events.

You can find all the events on the days under the following link:

https://www.nuernberg.de/internet/stadtportal/tag_der_offenen_tuer.html