Twice-lifesize portrait of Bird Jaguar IV in the central niche of Structure 33. This statue is illuminated by the sun at sunrise on the summer solstice. Carolyn Tate writes:
"On the back of the head and the body of the sculpture are four columns of glyphs. They are chipped and appear to have suffered water damage, especially the upper ones. I suspect that the head must have been broken by the falling lintel (and whatever was on top of that lintel), and that it rolled outside, where it was exposed to the rain for a long time. The unfortunate matter is that the glyphs probably named the figure. Only one is recognizable to me as part of a nominal phrase: Ah Kal Bac or "He of 20 Captives," one of the appellatives of Bird Jaguar IV."
Carolyn E. Tate, Yaxchilan: The Design of a Maya Ceremonial City, p. 320