Oberalteich Abbey, dedicated to Saints Peter and Paul, was founded in c. 1100 by Count Frederick of Bogen, a lord protector of Regensburg cathedral. After a serious fire in 1245 the premises were re-constructed under abbots Heimo (1247 to 1252) and Purchard (1256 to 1260). Under abbot Friedrich II (1346 to 1358) the abbey was fortified. The church was extensively altered in the time of abbot Johann II Asperger (1438 to 1463). The medieval monastery complex was modernised by abbot Veit Höser (1604 to 1634), which was followed by a total baroque refurbishment from 1682-1721.
The abbey was dissolved in 1803 during the secularisation of Bavaria, and the monastery buildings were disposed of. Accommodation for the local priest and a servant were set up in part of them.
The abbey church of Saints Peter and Paul was rebuilt between 1622 and 1630 and is richly decorated. The baroque high altar dates from 1693. The church of the former abbey became the parish church in 1803. In 1847 the tombs and monuments were removed from the church and taken to Vilshofen where they were used for the construction of a dam.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.