Researchers have unearthed a very special votive offering in the ‘Great Basement’ of Tlatelolco, Mexico City. The offering was discovered inside a stone box or cist and includes a large collection of obsidian knives of various types, and also blocks of copal. The finding provides invaluable insights into the ceremonial practices of the Tlatelolca people between 1375 and 1418 AD.  A Timely Discovery Amid Conservation Efforts  This remarkable find coincides with the 80th anniversary of explorations at the Tlatelolco Archaeological Zone, located in the very center of today’s Mexico City.  Read moreSection: NewsHistory & ArchaeologyRead Later