In the 13th century, a three-nave Romanesque towerless basilica was built in Daia. The enclosure wall, the round-arched arcades and the walled up west portal have been preserved. Around 1500, the choir received its polygonal end and a groined vault with lunettes. The simple sacrament niche, the side aisles and the buttresses of the choir also date from this period. The Baroque altar is dated 1797, the central picture shows the Crucified with Mary and John. The mechanical organ was built around 1800 by Johannes Hahn junior. The church is surrounded by a simple circular wall with an oval floor plan.
