The institute provides guest houses for shorter visits (to be arranged with the relevant department's administrative assistant). For a longer stay, you will need to find an own apartment. Check the information board, the local newspapers or the internet for available apartments 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 an appointment or accompany you when viewing an apartment.