The Shrine of the Three Kings in Cologne Cathedral is a goldsmith's reliquary that dates from the end of the 12th century. It is used to store bones that Archbishop Rainald von Dassel brought to Cologne in 1164 and that are venerated in the Roman Catholic Church as the relics of the Three Kings. In addition, the shrine contains the remains of Gregory of Spoleto and other parts that can no longer be assigned, but have long been attributed to Saints Felix and Nabor, to whom a Gothic window in the Michael's chapel is dedicated.
The shrine, which was made between 1190 and 1225 by the goldsmith Nikolaus von Verdun, is considered to be the largest and most artistically sophisticated reliquary that has survived from the Middle Ages. It has two floors in the form of a basilica and is decorated with golden figures, gemstone jewelry, gems, cameos and enamel, which illustrate the Christian history of salvation from the beginnings of the Old Testament to the Last Judgment. (Source: Wikipedia)