The Pula Cathedral or fully the Cathedral of the Assumption of the Blessed Virgin Mary (Croatian: Katedrala uznesenja Blažene Djevice Marije) is a co-cathedral in Pula, Croatia. Along with the Euphrasian Basilica it is one of the two official seats of the Roman Catholic Diocese of Poreč and Pula. The church is located on the south side of the Pula bay at the foot of the hill with the 17th century Venetian fort. The site of the present-day church has been used for religious worship since ancient Roman times and the first Christian churches on the site were built in the late 4th and early 5th century AD.