Cordoba parte uno

This formeer Roman town was occupied by the Caliphat and the Spanish. 

The only remaining synagogue is Spain (if I understood correctly?)

The Mosque cathedral, built and then expanded to increase capacity from 5000 to 40000 from the 5th-8th century, and converted to a cathedral in the 11th century. The most miraculous thing about the bldg is that it survived the middle ages.