This main subject of the tapestry, the throne of God and the Glory surrounding it (Revelation 4:1- 11), was revealed to the prophet of the Book of Revelation, John of Patmos, when he was summoned through "an open door" into heaven . There, John saw "four living creatures" surrounding God's throne, each creature had a different face. The first had a face like a lion, the second an ox, the third a man, the fourth an eagle (4:6-8). In his right hand God held a scroll, sealed with seven seals. This vision, which eventually led to the tapestry episode of St Michael and the Devil, or Satan, centres not on the content of the scroll, but on the opening of its seven seals. No one was found worthy to open the seals but Christ, who was introduced enigmatically as "the Lion of the tribe of Judah" and also as a "Lamb standing, as though it had been slain." The Lamb was acclaimed by the heavenly court and proceeded to open the seals as a demonstration of his universal authority.