https://en.wikipedia.org/wiki/Limburg_Staurotheke

The Limburg Staurotheke (from Greek, stauros “cross” and theke “container”) is an example of a Byzantine reliquary, one of the best surviving examples of Byzantine enamel, in the cloisonné technique. It was made sometime in the mid to late 10th century in Constantinople. The box measures 48 centimeters by 35 centimeters and has a depth of 6 centimeters. This reliquary design was common in Byzantium beginning in the 9th century.[1] It was probably brought to Germany as loot from the Fourth Crusade, and is now in the diocesan museum of Limburg an der Lahn in Hesse, Germany.

The Limburg Staurotheke consists of two parts that were made at separate times. The removable, double-armed cross was made first and holds seven fragments of the True Cross in the middle of the cross where its main set of arms meets.[2] The cross is made out of sycamore wood and is entirely covered in gilded silver and embellished with gemstones and pearls. Inscribed on the back of the cross is the following verse:[3]

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Note added at 42 λεπτά (2022-09-27 16:03:33 GMT)
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You're most welcome. Have a nice evening ahead and a healthy and peaceful wintertime!