Next to the settlement Batvači is the impressive basilica of St. Fosca, an important cultural-historical monument which given its size was erected further from the settlement and the present day holiday houses. There is no documentation from which it can be concluded when it was built. The existing basilica of St. Fosca is located not far from the prehistorical fort. It was built as a triple naved basilica with lateral naves, almost as high as the main nave. Three pairs of semicircle arcades separate the main nave from the lateral walls. The eastern arcades are bigger than the others and rest on rectangular monolith columns, while the other arcades rise from massive bricked columns. On the eastern side, the somewhat narrowed back wall ends with three apses of a rectangular floor plan which in demicalottes pass over trompes. In each apse there is a walled altar illuminated through a window in the centre of the apse. The semicircle apses are encapsulated in a rectangular space and are not visible from the outside.
The former appearance of the church was significantly altered in the reconstruction which lasted from 2000 to 2004. Returning the basilica style properties to the church building changed, to a great extent, its exterior volume and contours which generations had become used to throughout the centuries. In return the church was given more elegant proportions and, what’s more important, the original lighting of the central area through the windows at the top of the main nave was once again restored. On the thick wall columns some of the older covering plaster was preserved in which one can see etched graffiti. Discernable are drawings of a sailboat, birds, while there are mostly parallel vertical lines in a row: this were the “records” of masses served or prayers held.
(Literature; Ivan Matejčić “Saint Fosca”; Marijan Jelenić “Vodnjan and its surrounding area”; “Attinianum” gazette of the Town of Vodnjan)