The village of Mosna is located in the central part of Romania, in the southern side of Transylvania, in Sibiu county. The fortress-church is situated in the center of village.

The first church, an Early-Gothic basilica, was erected at the beginning of the 13th century. The present church is the result of Andrea Lapicida’s work. Lapicida, a stone mason from Sibiu, worked in Mosna at the end of the 15th century.

He was the creator of, among other parts of the church, the ribbed vault of the nave, choir, and vestry; the exceptional stone masonry work like that found in the south and vestry doorways; the windows frames, the ambo, the tabernacle, and sedilia.
Parts of the old church, such as the west doorway, were included in the new one. The bell tower is in front of this doorway, and its slender roof rises today at the same place where the hoarding and defensive level once were.

The protective wall, which encircles the church, has many towers and bastions, among them a massive gate tower equipped with machicolations.

A zwinger is situated on the southern part of the protective wall. In the northeastern part of the church are the remains of a Gothic chapel. The folding triptych altar was made in 1834.The church organ was completed in 1874.