Cathedral of Cologne
The Cathedral of Cologne is renowned as a monument of Christianity and of Gothic architecture. It is the largest Gothic church in Northern Europe. Because of its enormous twin spires, it also presents the largest façade of any church in the world. The famous tomb of the Magi is contained within its walls. Three copper lamps, always burning, bear the names of the three kings, Gaspar, Melchior, and Balthazar.
DeColange, Leo The Heart of Europe from the Rhine to the Danube (Boston, MA: Estes and Lauriat, Publishers, 1883)