St. Marine's church is a hall church (3.05 × 5.13 m) built of irregular sandstone blocks in irregular courses. The entrances are on the south and north (by the shoulder of the apse). The north entrance is walled up and converted into a niche. The south door is arched on the inside; outside, both entrances are topped with architraves. In the semicircular apse is a rectangular niche on the north, while on the south a door is cut leading into a diaconicon set within the thickness of the wall.