It contains relics of the Three Wise Men, and its ladychapel has a triptych of the adoration of the Magi done in the 1440s by the town's most famous painter, Stefan Lochner.  It was built on the site 
It contains relics of the Three Wise Men, and its ladychapel has a triptych of the adoration of the Magi done in the 1440s by the town's most famous painter, Stefan Lochner.  It was built on the site of a Roman villa, some of whose mosaics can be found next door in the Roman-German museum.  Although begun in the 13th Century, work on it stopped in 1560 not to be resumed until 1842.  FTP, name this cathedral located in and named for a German city on the Rhine.
It contains relics of the Three Wise Men, and its ladychapel has a triptych of the adoration of the Magi done in the 1440s by the town's most famous painter, Stefan Lochner.  
Cologne Cathedral or Koln Cathedral or Kolner Dom