Cathedral of the Assumption of Mary
The Cathedral of the Assumption of Mary is a Romanesque church dating from the 11th century. Hardly anything is known about the cathedral before the year 1000, although in Koper, with interruptions, bishops have been enthroned since 520. The oldest mention of the Romanesque Church of Mary in Koper dates back to the end of the 11th century. The church houses the relics of St. Nazarius and St. Alexander.