August 1, 1389Letter of Pierre d'Arcis, Bishop of Troyes, to Pope Clement VII on the Cloth of Lirey (c. 1389)Bishop Pierre d'Arcis writes to Pope Clement VII challenging the authenticity of the Shroud displayed at Lirey, claiming it was 'cunningly painted.'DocumentHistory
February 16, 1989Radiocarbon Dating Study PublishedThree independent laboratories dated the Shroud to 1260-1390 CE, sparking decades of scientific debate.Science