Mayan glyphs. Historian reading a copy of a panel found at the Palace of Taj Chan Ahk in Cancuen,a major trade city that was at its peak during the 7th century AD. The panel tells of the full history of Cancuen,from 650 BC to 800 AD,and lists the kings who ruled it. The city,located in Pasion,El Peten,Guatemala,specialised in trading jade,pyrite and obsidian. Its strategic position on the Pasion River helped it dominate trade in the region. Taj Chan Ahk,one of the city's most powerful rulers,built his huge palace in 770 AD |