Thietland of Einsiedeln

an angel. That angel is the Lord Jesus Christ, an angel of great prudence, who decended from heaven through the mystery of the Incarnation.

chain. By this is the great quantity of his power represented.

old serpent. The Devil is rightly called serpent because he decieved the first man through the serpent, and also rightly called old on account of the antiquity of the time, because at the beginning of created things he was created by God.

For Gog is interpreted as 'covered', and Magog as 'uncovered'.