Altenberg Cathedral also called the ''Bergische Dom'' is the church of the former Cistercian Abbey Altenberg (1133-1803). In 1857 the Prussian King gave order that Catholics and Protestants have to use this church simultaneously.
Hotel Petersberg has become the Guest House of the Federal Republic of Germany. It is located on the Petersberg a prominent mountain of the Siebengebirge near Bonn. With a height of 331 meters it looks over Königswinter on the right bank of the Rhine River.
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