Free to enter and easy to have almost to yourself, this Norman-era church was built directly on the foundations of a 5th-century BC Greek temple, one of the clearest physical examples anywhere in Agrigento of how each era here builds literally on top of the last.
A glass floor set into the nave lets you look straight down at the ancient temple stones beneath your feet without needing to descend at all, a striking, immediate way to see the layering.
“Descend into the crypt below and the original Greek columns are still visible, embedded directly into the later structure.”