Quiz a local on what the most well-known structures in town are and they'll likely mention Administrative Palace. It's one of the first things you'll spot when you start your sightseeing.
When you've spent a bit of time at this modern piece of architecture in Satu Mare, why not make your way to Satu Mare Central Park, Garden of Rome, and Firemen's Tower? They're not far from Administrative Palace and also a hit with many travelers.