Maya rulers carved elaborate monuments that told stories of their ascent
to the throne, their lineage, important battles, or other events. The Maya
had a sophisticated and accurate calendar and a system of hieroglyphic writing.
They dated many monuments and included the names of kings and when they
reigned. There is one unfinished monument at Copán that can provide you with clues.
Unfinished altar
This stone monument, an altar, might have been carved for use
as a throne platform for a Maya ruler. One side was completed, but the
other sides were left unfinished. On one of these unfinished sides, the
Maya text shows a date, equivalent to February 10, A.D. 822. The remaining
text was never finished. There are no known monuments at Copán dated after A.D. 822.