Where is the old web site
The old web site may be available at http://old.informatika.ftn.uns.ac.rs. A lot of stuff is still there, waiting to be migrated here. If you're looking for course materials, go to https://enastava.io and sign up if needed.
Where is the building?
Our old building at Fruškogorska 11, Novi Sad is being demolished to give space for a new one. In the meantime, we are at Narodnog Fronta 21a, Novi Sad.