You can learn a lot of information from going on a tour of a medical institution. Check to see if Hospital of the Holy Ghost is open to the public while you're in town.
This health care institution in Frombork is well-liked by many travelers, so leave a spot for it on your to-do list. However, don't end your sightseeing there. There are many more options ready for you to appreciate after Hospital of the Holy Ghost. Cathedral of the Assumption of the Blessed Virgin Mary and St. Andrzej, Nicolaus Copernicus Museum, and Frombork Municipal Cultural Center are close by.