This is a bysantinian devotional dress from 14th century (chasuble or
dalmatic), very richly embroidered by christian motives. It is
presently located in St. Peter's Basilica in Vatikan. For a long time
it was considered a dalmatic of Charlemagne. The pattern is very
simple, consisting of 2 identical pieces (front and back) which were
probably extended on the lower rim to achieve the proper length. Those
2 pieces are only sewn together on the shoulders and along the arm
under the armpit. There are no other seams in the garment. The overall
length of the garment is 160 cm, suggesting that it was made for a
very tall man.
Based on: Photographs and measurements from Metropolitan Museum, New Yorku.