Another work by this artist of Madonna of Chancellor Rolin shows clergy, knights, prophets, and martyrs gathering for the central Adoration of the Lamb scene, and also shows God the Father enthroned in its top panel.
A man in red leaning over some ramparts in front of a river cityscape can be seen through three arches in one work by this artist, which also shows a man in brown and gold robes kneeling at a Book of Hours in front of Mary.  Another work by this artist of Madonna of Chancellor Rolin shows clergy, knights, prophets, and martyrs gathering for the central Adoration of the Lamb scene, and also shows God the Father enthroned in its top panel. This man is best known for a work with a circular mirror on the back wall, an open window at left, and a dog at the feet of a newly wedded couple. For 10 points, name this Flemish painter of The Ghent Altarpiece and The Arnolfini Wedding.
A man in red leaning over some ramparts in front of a river cityscape can be seen through three arches in one work by this artist, which also shows a man in brown and gold robes kneeling at a Book of Hours in front of Mary.  
Jan van Eyck [Accept Johannes de Eyck, as well as the Madonna of Chancellor Rolin before “this artist.”]