Church ruins of St. Cecilia, Church ruin in Perersdorf, Pyhra, Austria

The Church ruins of St. Cecilia is a medieval building featuring a 30-meter standing tower and remnants of a nave that measured about 27 meters long and 8 meters wide. The southern section preserves an intact vaulted sacristy, while the remaining areas exist as stone walls.

A church existed here by 1280, though records suggest construction between 1250 and 1260. In 1388 the parish priest of Pyhra, Nikolaus, committed to celebrating Mass here every Saturday in honour of St. Cecilia. Ottoman troops destroyed church and manor in 1683; it was partly rebuilt the following year and baroquified in the 18th century. French troops plundered and wrecked it again in 1805.

The church was called "St. Cecilgen, which lies by the Gretzhof" in a 1388 record, when the Pyhra priest Nikolaus pledged with Abbot Wolfgang of Göttweig to read a Mass there every Saturday in honour of Saint Cecilia. The Gretzhof farm name survives in the record; the ruins stand near Perersdorf between Pyhra and Böheimkirchen.

The ruins sit on an elevated position along the road between Pyhra and Böheimkirchen and are easily visible from outside. The site is accessible, though visitors should be prepared for uneven ground and the exposed stone structure.

The sacristy on the southern side retained its vaulted ceiling and integrity while most other sections became open walls. This makes it a rare example of a preserved interior structure among church ruins.