The institute provides guest houses for shorter visits (see about the institute/ guest houses). For a longer stay, you will need to find an own apartment. Check the information board, the local newspapers or the internet for available flats in the surrounding. You might also ask your colleagues if they know about an apartment for rent.
The WO will be happy to help in finding a place for you to stay. We can also assist in arranging a booking or accompany you when visiting a flat.