can you mention the region where this civilization developed?
Southeastern Mexico and northern Central America.
Maya civilization
The Maya civilization occupied a wide territory that included southeastern Mexico and northern Central America. 
who held the power in the maya civilization The king. when did this civilization develop? 2600 BC. which materials and technology are used by the people of that time to build their cities? Neolithic technology; stone, limestone, volcanic tuff, sandstone and fired bricks. which was the common language spoken at that time? Proto-Mayan. any museum in which artefacts of that time are preserved? Yes, there are.
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Maya civilization [SEP] Geography
The Maya civilization occupied a wide territory that included southeastern Mexico and northern Central America. This area included the entire Yucatán Peninsula and all of the territory now incorporated into the modern countries of Guatemala and Belize, as well as the western portions of Honduras and El Salvador. Most of the peninsula is formed by a vast plain with few hills or mountains and a generally low coastline. The Petén region consists of densely forested low-lying limestone plain; a chain of fourteen lakes runs across the central drainage basin of Petén. To the south the plain gradually rises towards the Guatemalan Highlands.