Another view showing the almost fractal iteration of the stylized serpent motif. Eaton writes that most of the wall surfaces were painted red, but that parts of the the façade still retain traces of red, black, white, blue, yellow, and green paint. This building must have been an extraordinary sight in A.D. 750.
Eaton continues, "Buildings with monster-mouth doorways are found not only in the Rio Bec and Chenes regions, but also in the Puuc region: for example, on Building 1 (west of the Governor's Palace) and El Adivino at Uxmal; on Las Monjas at Chichen Itza; and also on Temple XXII at Copan, Honduras. The styles vary greatly from region to region, as does the basic architecture. This suggests a common Late Classic religious decorative theme implemented by architects with widely differing construction traditions and techniques."
(Eaton 1974: 134)