civilization did not incorporate metallurgy or wheel technology in their architectural constructions, they developed complex writing and astronomical systems, and created beautiful sculptural works in stone and flint. Like the Inca, the Maya also had command of fairly advanced agricultural and construction technology. The Maya are also responsible for creating the first pressurized water system in Mesoamerica, located in the Maya site of Palenque. The main contribution of the Aztec rule was a system of communications between the conquered cities and the ubiquity of the ingenious agricultural technology of chinampas. In Mesoamerica, without draft animals for transport (nor, as a result, wheeled vehicles), the roads were designed for travel on foot, just as in the Inca and Mayan civilizations. The Aztec, subsequently to the Maya, inherited many of the technologies and intellectual advancements of their predecessors: the Olmec (see Native American inventions and innovations). Medieval to early modern One of the most significant developments of the Medieval were economies in which water and wind power were more significant than animal and human muscle power. Most water and wind power was used for milling grain. Water power was also used for blowing air in blast furnace, pulping rags for paper making and for felting wool. The Domesday Book recorded 5,624 water mills in Great Britain in 1086, being about one per thirty families. East Asia Indian subcontinent Islamic world The Muslim caliphates united in trade large areas that had previously traded little, including the Middle East, North Africa, Central Asia, the Iberian Peninsula, and parts of the Indian subcontinent. The science and technology of previous empires in the region, including the Mesopotamian, Egyptian, Persian, Hellenistic and Roman empires, were inherited by the Muslim world, where Arabic replaced Syriac, Persian and Greek as the lingua franca of the region. Significant advances were made in the region during the Islamic Golden Age (8th-16th centuries). The Arab Agricultural Revolution occurred during this period. It was a transformation in agriculture from the 8th to the 13th century in the Islamic region of the Old World. The economy established by Arab and other Muslim traders across the Old World enabled the diffusion of many crops and farming techniques throughout the Islamic world, as well as the adaptation of crops and techniques from and to regions outside it. Advances were made in animal husbandry, irrigation, and farming, with the help of new technology such as the windmill.