The 2012 campaign of the archaeological research project permitted the exhaustive excavations of the immediate surroundings of the southern nave of the abbey church of St Peter in Osor. The richness and the complexity of the discovered structures confirmed the great archaeological potential of this sector. Namely, a funeral zone that is situated south to the church is occupied by two buildings perpendicular to the church which we interpret as a mausoleum (the one on the west) and a chapel with one privileged burial (the one on the east). The great number of built tombs or simples graves confirmed that this sector had funeral function even before the XIth century and the construction of the early Romanesque church, until the early modern period. Furthermore, the primary analysis of the eastern part of the Venetian city wall and the long monastic building situated in the eastern part of the monastery was carried out.