The Holy Thorn Reliquary was probably created in the 1390s in Paris for John, Duke of Berry, to house a relic of the Crown of Thorns. The reliquary was bequeathed to the British Museum in 1898 by Ferdinand de Rothschild as part of the Waddesdon Bequest. It is one of a small number of major goldsmiths' works or joyaux that survive from the extravagant world of the courts of the Valois royal family around 1400. It is made of gold, lavishly decorated with jewels and pearls, and uses the technique of enamelling en ronde bosse, or "in the round", which had been recently developed when the reliquary was made, to create a total of 28 three-dimensional figures, mostly in white enamel.

Feather tights is the name usually given by art historians to a form of costume seen on Late Medieval depictions of angels, which shows them as if wearing a body suit with large scale-like overlapping downward-pointing elements representing feathers, as well as having large wings. Other sources use feathered angels to describe the style. The style is assumed to derive from actual costumes worn by those playing angels in medieval religious drama, with the "feathered" elements presumably flaps or lappets of cloth or leather sewn onto a body suit. The feathers on angels in art can often to be seen to stop abruptly at the neck, wrists and ankles, sometimes with a visible hemline, reflecting these originals.