<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> In archaeology, the classic Maya collapse is the decline of Classic Maya civilization and the abandonment of Maya cities in the southern Maya lowlands of Mesoamerica between the 8th and 9th centuries, at the end of the Classic Maya Period . Preclassic Maya experienced a similar collapse in the 2nd century . </P> <P> The Classic Period of Mesoamerican chronology is generally defined as the period from 250 to 900, the last century of which is referred to as the Terminal Classic . The Classic Maya collapse is one of the greatest unsolved mysteries in archaeology . Urban centers of the southern lowlands, among them Palenque, Copán, Tikal, and Calakmul, went into decline during the 8th and 9th centuries and were abandoned shortly thereafter . Archaeologically, this decline is indicated by the cessation of monumental inscriptions and the reduction of large - scale architectural construction at the primary urban centers of the Classic Period . </P>

The collapse of the mayan empire is believed to have occurred during