The Cathedral as seen today in Valencia was started about 1261/62 AD and has had a number of modification, and additions since that time.
Originally built on the site of a previous temple during Roman times dedicated to the Goddess Diana. After the Romans, the Moors replaced the Diana Temple with a Mosque. Then, when James I of Aragon took the city from the Moors in 1238 he converted the Mosque into a christian church.