Romanesque parish church of Saint Nicholas and Assumption of the Virgin Mary was erected at the end of the 12th century or at the turn of the twelfth / thirteenth century. Its interior, as revealed by excavations, hides the relics of the earlier church. This much smaller building was built in the second half of the 11th century and was perfectly orientated along the line of the later temple, with a slight shift to the north. Its foundations were partly used to erect today’s temple, whose ground walls were placed directly on them.
The church has been renovated many times. The most important of the restaurants took place after a fire in 1713, and next at the end of the eighteenth and mid-nineteenth century, and in 1881 and 1900. In the nineteenth century, buttresses, porch and tower were added to the medieval monument. In the years 1953-1956, works strengthening the ground and walls of the church were carried out, and fortunately, the 19th century annexes were demolished.
The first church from the 11th century was a small aisleless building with a rectangular nave and an apse adjacent to it from the east. Wide foundations carried the walls of the building with a small interior: the nave was only 5 meters long and only 4 meters wide. The interior of the apse was on a horseshoe plan with a diameter of about 2.5 meters and connected to the nave with a hole about 2 meters wide.
The church from the twelfth / thirteenth century was erected of granite blocks. It is a single-nave structure, with a short span of the chancel finished with a semicircular apse. Inside the church there is a late gothic, sandstone font in the form of a liturgical cup and a late-gothic wooden figure of Madonna and Child.
Webpage giecz.pl, Osada przygrodowa.
Webpage zabytek.pl, Kościół pw. Wniebowzięcia NMP i św. Mikołaja, Giecz.