One of the most beautiful stained glass windows in USA is found in St. Mary's Basilica, a Roman Catholic church in Covington, KY. The Cathedral's north transept window is the world's largest church stained glass window, measuring 67 feet in length by 24 feet wide. It presents the early fifth century Ecumenical Council of Ephesus that proclaimed Mary as the Mother of God.
Theodosius Arrives at Ephesus from a Scene from the Legend of the Seven Sleepers of Ephesus, ca. 1200–1205. Made in Rouen. French. The Metropolitan Museum of Art, New York. The Cloisters Collection, 1980 (1980.263.4) #Cloisters
Adoration of the Magi from Seven Scenes from the Life of Christ, ca.1390. Made in Ebreichsdorf, Lower Austria. The Metropolitan Museum of Art, New York. The Cloisters Collection, 1986 (1986.285.1) #Cloisters