Remains of sculptural decoration found in the lower layers of the altar apse and the sacristy of the Church of St. Mary (Collegiata) in Kotor, as well as the remains of church furniture, allow a certain reconstruction of the Early Christian basilica that was located on the site of the present-day church. The decoration consists mainly of floral and geometric motifs (interlacing). The remains of the altar architrave beam, which consists of a three-part braid and an inscription in Latin IN N(OMINE) D(OMI)NI ET S (ALVATORI)... (J)OHANNIS CVM CONIV(GE), were found. The name Ivan that is read in the inscription is probably the Bishop Ivan of Kotor with his wife. More parts of the inscription were found, but they were not preserved enough to allow an interpretation. Above the Early Christian baptistery a triangular pediment with an archivolt was found carved in local yellow limestone. The interweaving and motifs are similar to the motifs of Prince Ivan's inscription, whose tombstone was also excavated. The lintel with the Latin inscription above the Southern portal of the church also belongs to this group and states: IN NOMINE D(OMI)NI D(E)I SALVATORI NOSTRIS IHS XPI INTER ANTUBVUS PAX EXIENTIBUS SALVTE.