Ancient town and early Christian complex in the bay of Sepen by Omišalj In the bay of Sepen by Omišalj, in the I. century A.D., a new roman town Fulfinum was built for the needs of the veterans of the Flavian emperors. Municipium Flavium Fulfinum was built according to the usual town-planning scheme: on a flat area with rectangular communication lines. The navigable bay made possible the construction of a protected harbour, while the fertile soil rich in water sources was a base for the development of the town. The town had all the facilities needed for life in the antiquity: a forum with the Capitol and the basilica, port facilities with the commercial quarter, thermae, suburban communication lines with cemeteries and the water supply system. With the fall of the antique civilisation, Fulfinum was probably one of its first victims; envisaged as a town of high civil accomplishments, open and fragile, it was sensitive to the turmoils of life in the late antiquity and therefore it fell together with the civilisation that had created it. Nevertheless, the disappearance of this town, which like humans had its own destiny, left traces that are reflected in the changes of the spirit and the form; life continued among its ruins.
In the suburbs of this antique town, an early Christian complex (Mirine) was built in the V. century, which is connected to the Benedictine monastery of St. Nicholas.