The Romans respected protective factors. Their success has unified structure. surface usually rectangular solid protective wall. Into 4 main gate. Open ports on each side of the midpoint. opposite connector ports are two main roads called lanDecumanus and Cardo. At the intersection of two main streets is the center of the city, including the main square and public works. typically, in the flat terrain, the road is Decumanus axis east-west set. Cardo shorter shaft, located north-south direction. In the case of steep terrain or riparian, coastal, long axis parallel to the contour of the terrain or parallel to the shoreline but, coast. Short axis is always placed in the direction perpendicular to the long axis pipe. Four of the remaining land was divided into plots of land shaped like a regular pipe. This dividing influenced by the principles of Greek Hippodammus planning. The regular street block size usually come 150x150m 70x70m. On the plot of land, building or public works. Population density ranges from 250 to 500nguoi / ha. Particularly arena - public works has the largest area - often built inside or outside the walls of protection.
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