The pale faces of a row of men forms the border between the Earthly and Heavenly zones of this painting, in which the artist's son is shown pointing at the central scene.  
In the bottom left of this painting, a scene painted onto a cloak shows three nude figures forming a ring around yellow-clad figure who is praying. A large group of martyrs is looking from this painting's upper right towards a white-robed Jesus, and St. Peter is dangling a pair of keys in this painting's top left. This painting was made to be displayed six feet off the ground at the Church of Santo Tome. The pale faces of a row of men forms the border between the Earthly and Heavenly zones of this painting, in which the artist's son is shown pointing at the central scene.  For 10 points, name this El Greco painting that depicts a Spanish nobleman being interred.
In the bottom left of this painting, a scene painted onto a cloak shows three nude figures forming a ring around yellow-clad figure who is praying.
The Burial of Count Orgaz [or The Burial of the Count of Orgaz; or El Entierro del Conde de Orgaz; accept other answers describing the Burial of Count Orgaz