You'll probably spot Holy Spirit Cathedral from a distance before you actually find this important place of worship. Pop inside if the doors are open or just admire the facade from outside.
This principal church is in Hradec Kralove, a destination that has loads going for it! University of Hradec Kralove, Church of the Divine Heart of Jesus, and Merkur Casino are other worthwhile sightseeing opportunities not far away when you're done at Holy Spirit Cathedral.