Mezquita de Córdoba - a mosque containing a church
Since 784 AD this site has been host to: a Roman pagan temple, the cathedral church of St Vincent of Saragossa built by the Catholic bishops under Visigothic rule, and finally the Mezquita (mosque) itself. Within is a Renaissance cathedral, built by the Christian conquerors in the early 13th century. [wikipedia link]
Contributed by Kevin.

