Then I saw in the right hand of the one seated on the throne a scroll written on the inside and on the back, sealed with seven seals ... Then I saw between the throne and the four living creatures and among the elders a Lamb standing as if it had been slaughtered, having seven horns and seven eyes, which are the seven spirits of God sent out into all the earth (Rev. 5:1-6).
The book with seven seals is seen on a brickwork throne with battlements between two seraphim wearing bright tunics, whose six wings are adorned with eyes. The Lamb of God with a cruciform halo stands on the book, bleeding from a wound in the breast. His head has seven eyes and seven horns.
In the bottom panel, Saint John is on the left, and opposite him the angel pointing upwards.
From the 11th century Bamberg Apocalypse.