Bijaći was a medieval Croatian village, some 5 kilometres (3.1 mi) northeast of Trogir. The village developed around the church of St. Martha on the site of a former 1st century villa rustica at Stombrate locality, about half way between Tragurium and Salona, in the hinterland of the Roman veterans' coastal settlement of Siculi [hr]. Renovated in late antiquity, part of the villa became an early Christian church, which evolved between the 5th and 7th centuries.
Following the arrival of the Croats, it is believed that the complex of the villa was transformed into the center of a Croatian ducal estate, which stretched to the coast, incorporating the Divulje area and the church of St. Vital. During this period, the early church was repaired and rededicated to St. Martha; arguably, the church was a court church of the early Croatian dukes.