I cheated, I googled it. That's the National Gallery (Narodni Galerie) in Prague, Kinsky Palace (on the left side of the pic. So you two are in the Old Town square. My parents are flying over there in a couple weeks to take a cruise and visit a few places, I'll have to see if that area is on their itinerary. You can add me to the list of envious folks who would love to ride around and check out places where the history is more than a couple hundred years old.