Dubbed “La Rotonda” because of its unique architecture, it is a rare example of an eight-sided Catholic church. Construction began in 1594, and it’s believed the architect, Francesco Zamberlan, chose the octagonal shape for the symbolism of the number eight in the Christian religion. 

The structure is actually composed of two polyhedrons: the church itself, and an eight-sided porch that wraps around the exterior. Yet for all its geometric intrigue, the real highlight of this Rovigo gem isn’t revealed until you step inside.