We found in Valence a primitive oratory on the foundation of our current cathedral, later transformed into a church dedicated to saint Etienne ("Stephen"). In the 11th century, the bishop Lambert extended this church by adding a chapel. In 1095, he dedicated the cathedral.
In 1281, a lightning struck the bell-tower and destroyed it. During the war of Religion, vaults were damaged, and our cathedral remained in ruin until the beginning of the 17th century. The bell-tower was entirely demolished in 1838, and the current one was raised.