In the Pre-classic period (1800 B.C. to A.D. 250), permanent village life grew and lead to the early Maya cities. The early Maya cities were carefully planned. Nixtun-Ch'ich, in Peten, Guatemala, had pyramids, temples and other structures that were built using a grid system.

Farming became more effective during this period, likely because of the discovery of the "nixtamal" process, where maize is soaked in lime or something similar and cooked to increase the nutritional value. Other crops included squash, bean, chilli pepper and manioc.

Between A.D. 350 and 900, ancient Maya reached a peak. The civilisations reached intellectual and artistic heights that few could match.

Cities found throughout the Maya world had their individual wonders.

• Tikal is known for its twin pyramids constructed at the end of every K'atun (20-year period).
• Copan is known for its "Temple of hieroglyphic Stairway" - a pyramid-like structure with glyphs on the 63 steps that seem to tell the history of the city's rulers.
• The site of Palenque is known for its limestone sculpture and the burial of one of its kings inside a pyramid.

Many cities were indeed abandoned around 1,100 years ago, including Tikal, Copan and Palenque. A recent study suggests that drought may have played an important role.

But other Maya cities grew for a time, such as Chichén Itzá. Council houses - places where people in a community gathered - flourished after the ninth century. But, when the Spanish arrived, they brought diseases that decimated the Maya. Despite the devastation, the Maya people continue to increase.

According to stories recorded by the K'iche Maya, the forefather gods Tepew and Q'ukumatz created the Earth from a watery void and added animals and plants. Eventually, humans were made, including twins, Hunahpu and Xbalanque, who defeated the lords of the underworld. Later, the twins' father, the maize god, was resurrected.

The world consisted of Earth (the domain of the Maya people), sky (the realm of celestial deities), and the watery underworld (the realm of the underworld deities.)

• The Itzamnaaj was lord over the most fundamental opposing forces - life and death, day and night, sky and earth. Itzamnaaj could be depicted as a serpent or two-headed reptile.
• Other deities included the sun-god K'inich Ajaw, the rain and storm god Chaak, and the lightning god K'awiil.
• The Maya believed each person had a 'life force' in their blood, and draining the blood in a temple could give some of this life force to a god.

Record-keeping was essential for agriculture, astronomy and prophecy. By keeping records of the seasons, the Maya could determine the best times to plant and harvest their crops.

Moreover, recording the movements of the sun, moon, planets and stars helped them to develop accurate calendars that they could use for prophecy.

The Maya had a sophisticated economy that could support specialists and a system of merchants and trade routes. They used various objects as currency, including greenstone beads, cacao beans and copper bells.

Maya rulers managed the production and distribution of status goods and critical commodities like salt. Maya labourers were subject to a labour tax to build palaces, temples and public works.