found: The Holy Thorn reliquary, 2010:t.p. (Holy Thorn reliquary) p. 5, etc. (made in gold and enamel and decorated with precious stones; commissioned around 1400-10 by Jean, duc de Berry, to house a thorn from the relic of Christ's Crown of Thorns)
found: British Museum website, viewed Aug. 26, 2011(Holy Thorn Reliquary of Jean, duc de Berry; Paris, France, before AD 1397; example of the art of émail en ronde bosse)
found: Burlington magazine (via JSTOR), June, 1941):p. 201 (Reliquary of the Holy Thorn, made for the Duc d'Orleans, between 1389 and 1407)
found: Oxford art online, viewed Aug. 26, 2011(under Valois, House of/Jean, Duc de Berry: Reliquary of the Sacred Thorn (c. 1400; London, BM))