Terrifying visions of the Apocalypse revealed the fears of medieval Spain - Gallery III

Revelation 20: “And I saw an angel coming down out of heaven, having the key to the Abyss and holding in his hand a great chain. He seized the dragon, that ancient serpent, that ancient snake, who is the devil, or Satan, and bound him for a thousand years. He threw him into the Abyss, and locked and sealed it over him, to keep him from deceiving the nations any more until the thousand years were ended . . . When the thousand years are over, Satan will be released from his prison and will go out to deceive the nations in the four corners of the earth . . . and to gather them for battle. In number they are like the sand on the seashore.”

A scene from chapter 19 shows the righteous defeating the land beast and the false prophet.

The seven-headed sea beast described in Revelation 13 threatens an angel.