In the fifth century relics of St Nazarius were translated to Embrun, which had supported a bishop since the fourth century; Embrun became a noted place of pilgrimage.
Nazarius and Celsus - two martyrs whose bodies were discovered by Saint Ambrose
The building from the end of the 16th century at first served as a hospital of St. Nazarius and was blessed as a church by the Koper Bishop Paolo Naldini in 1706.
Basilides, Cyrinus, Nabor and Nazarius are saints of the Roman Catholic Church, mentioned in the Martyrology of Bede and earlier editions of the Roman Martyrology for 12 June as four Roman martyrs who suffered death under Diocletian.