The very plain East Building
The very plain East Building sits on its courtyard and raised foundation.
Northeast from the mound on which the great wall stands, and about one hundred and fifty yards distant, is a large building, erected on a terrace, and hidden among the trees growing thereupon, with its front much ruined, and having but few remains of sculptured ornaments."
John Lloyd Stevens, Incidents of Travel in Yucatan: New Edition by Karl Ackerman with Historical and Modern Photographs, Smithsonian Institution Press, Washington and London, p. 159
The East Building has been restored since Stephens' visit.