Bonn Cathedral was built in the 11th century as the Romanesque collegiate church of St. Cassius and Florentius of Cassius Monastery. In 1583-1589 and 1689 the cathedral was considerably destroyed. The building was restored between 1883 and 1889, in 1934 and after the Second World War.
The church of St. Remigius is a Gothic basilica with three naves whose construction was begun in 1274 / 1275 by the Franciscan order. In 1689, the church was severely damaged by bombing by Brandenburg troops, and the roof of the church and its ridge turret burned down. The Franciscans repaired the roof and restored the interior in the years 1738-1748. The monastery was secularized and abolished in 1803.
St Adelheid-Kirche is located in Troisdorf-Müllekoven, a village in Nordrhein-Westfalen about 5 miles north-east of Bonn.
St. Mariä Heimsuchung is located in Impekoven, a district of the municipality of Alfter in Nordrhein-Westfalen.
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