Church of St. John the Baptist and the observation tower in the Teplice spa

The dean's three-nave basilica with a rectangular presbytery is located in Teplice on Zámecké náměstí and was built on the foundations of an older church. In 1594, they dedicated it to the patron saint of healing springs, Jan the Baptist.
 
They rebuilt the church to its current baroque form between 1700 and 1703. The church as a whole is interesting, but the main landmark is located in the northwest facade of the building. Lookout towers are something...