Its not in Tarnow county either, but you're kind of close..... its located at Tarnobrzeg.
Aaah, of course. When I saw the coat of arms of Tarnowski aristocratic family, my first thought was about Tarnów, their original nest. I forgot they also established other towns, including Tarnobrzeg. A good riddle. :):)
This old cannon located at the front entrance might clue you in.......
hahaha If only I knew all old cannons and their replicas in front of Polish castles and palaces... But thanks for this hint, I just remembered there is Baranów Sandomierski Castle in Tarnobrzeg county. :):)
The garden next to the castle features more such statues:
PS. Unfortunately, I need to take a break from the riddle thread as I am going to prepare new riddles which will take some time. All riddle masterminds - have fun while I am away and good luck in guessing. :):)