The buried room apparently was a workshop used by scribes or astronomers working for a Mayan king. The paintings depict the king and members of his court. The numbers mark important periods in the Maya calendar.
The room is about the size of a walk-in closet. It's part of the buried Maya city of Xultun. There are painted murals on three walls, depicting a resplendent king wearing a feather and four other figures. Maya paintings this old — the site dates to the ninth century — are very rare; tropical weather usually destroys them."