Patronal feast: June 29th.
The church ruins date back to the 5th century AD. The building reminds of church buildings in Aquileia and Milan. During excavations, the old position of the altar as well as the relic chamber could be determined. The S. Peter ruin in Altenburg is probably the oldest Tyrolean church ruin. Its decay began with the closure of the church in 1782.
Source: Parish office Kaltern
By car: from the village centre, follow the road towards St. Anton/S. Antonio, pass by the sport area and keep on driving on the main road until reaching the district of Altenburg/Castelvecchio. Parking possibilities at the restaurant Altenburgerhof.
By foot: starting from the sport area of St. Anton/S. Antonio, take the peace path (trail mark n. 11) until reaching Altenburg/Castelvecchio. As an alternative you can also start from St. Josef am See/S. Giuseppe al Lago and cross the Rastenbach gorge (trail mark n. 1) to Altenburg/Castelevecchio.
By bus: regular bus connections to Altenburg/Castelvecchio.