The five story building of Edzna exhibits various innovations in the development of Maya architecture in Yucatán. For one thing, the high stepped pyramid seems to be girded in all its exterior perimeter by rows of chambers that rest upon the filling of the lower level, their roofs serving as a terrace for the following level. For another, an element extremely rare in the architecture of other Maya areas makes its appearance here on the façade: a short column with a square capital. And finally, we note how the broad stairway spans some sections of the façade with variants of the corbeled vault that perform like flying buttresses.
Paul Gendrop, A Guide to Architecture in Ancient Mexico, p.72