The church of the Immaculate Conception of the Blessed Virgin Mary in Koszewo (Cussow in 1248, Kussowe in 1409) was built in two stages in the second half of the 15th century. The chancel was erected first, and the nave and tower were built at the beginning of the 16th century. Soon after, during the Reformation, the church was taken over by Protestants. At the beginning of the 18th century, the Oesterling family chapel was added to its southern side, which was used as a family crypt. In the nineteenth century, the church was renovated, then renovated again in the 1970s.
The church was built of erratic stones and bricks. At the end of the Middle Ages, it consisted of a wide, but short, aisleless nave, with a three-sided ended chancel in the east and a square tower on the west side. Its walls were decorated with slender, pointed-arched blendes and topped with decorative battlements of the upper gallery, from which a brick pyramidal spire arose. In the ground floor of the tower there was a pointed, three-stepped entrance portal made, similar to the portal connecting the under-tower porch with the nave. Another, originally pointed entrance was in the southern wall of the nave.
Unfortunately, the church has largely lost its original stylistic features. The windows of the nave were rebuilt into low and rectangular ones, and the southern portal was transformed using a full arch. The original portals have been preserved in the western walls of the nave and the tower. The latter avoided early modern transformations to the greatest extent. The layout of the church was enlarged by a southern chapel.
Katalog zabytków powiatu stargardzkiego, red. M.Majewski, tom 1, Stargard 2010.
Pilch J., Kowalski S., Leksykon zabytków Pomorza Zachodniego i ziemi lubuskiej, Warszawa 2012.