Deutz Abbey was founded in 1003 on the site of a Roman fort by the future Saint Heribert, Archbishop of Cologne, close adviser of Emperor Otto III. Heribert died in 1021 and was buried in the Romanesque church he had had built here. The theologian Rupert of Deutz was abbot during the 1120s.
The abbey had extensive properties, but its strategic position by the Rhine exposed it to involvement in fighting, and it was destroyed in the 14th century and again in the 16th century. It was dissolved during the secularisation of the Napoleonic era, but the abbey church, now known as Alt St. Heribert, became a parish church in 1804.
In World War II it was heavily damaged and only the ground floor and remnants of the Romanesque cellar were preserved. Reconstruction took place in the 1970s. Today the former abbey accommodates an old people's home run by Caritas. Notable are the mural paintings by the artist Werner Weber. The former abbey church of Alt St. Heribert is now used by the Greek Orthodox community of Cologne, and has been superseded as a Roman Catholic parish church by Neu St. Heribert, which now houses the shrine of Saint Heribert.
References:The Chapel of St. Martin is the only completely preserved Romanesque building in Vyšehrad and one of the oldest in Prague. In was built around 1100 in the eastern part of the fortified outer ward. Between 1100 and 1300, the Rotrunda was surrounded by a cemetery. The building survived the Hussite Wars and was used as the municipal prison of the Town of the Vyšehrad Hill.
During the Thirty Years’ War, it was used as gunpowder storage, from 1700 to 1750, it was renovated and reconsecrated. In 1784, the chapel was closed passed to the military management which kept using it as a warehouseand a cannon-amunition manufacturing facility. In 1841, it was meant to be demolished to give way to the construction of a new road through Vyšehrad. Eventually, only the original western entrance was walled up and replaced with a new one in the sountren side. The dilapidating Rotunda subsequently served as a shelter for the poor.