Hook-nosed deity masks flank the western stairway of the Pyramid of the Magician. This kind of mask is common to the point of omnipresence in the Maya northern lowlands. They have been variously identified as "masks of Chaak" (the Maya rain deity), "masks of Itzamnah" (the principal deity in the Maya pantheon), serpent masks, and as diagnostic features that identify buildings as symbolic "mountains."