Beginning from 1947 on here a new understanding was developing in America. In this new definition, urban design has started to be structured. The thoughts of urban design has started to be determined by the understanding of city-center language and cities-centrism. These cities; San Francisco, New York, Chicago and North America Cities. In his book City The City Eli, published by Eliel Saarien, he proposes konu organic decentrazation ine to American cities. One of the dense clusters of busines, educational. One of the the dense clusters of businesses,educational and industrial activities would be dispersed across the auto-scale metropolitan areas then emerging. The central pedestrian square to be designed in this context is inspired by the San Marco square in Venice. San Marco Plaza would have a range of housing types within walking distance.The square and the living areas are within walking distance; it leads to pedestrian roads without vehicles and naturally without traffic.The fact that social and commercial needs are within walking distance makes pedestrian squares a supporting factor. According to this, each of these dense, decentralized urban units would be surrounded by greenbelts. There is a spesific example of greenbelts which Eliel Saarien’s Helsinki Plan.
San Marco Plaza
San Marco Plaza is one of the main public square of Venice. From the Midlle Age, that square and other squares which surround of the San Marco Plaza became censters of the all city. All other urban areas in the city (except Piazzetta and Piazzale Roma) are called camps (“fields”). Piazzetta (“small Piazza / Square”) is an extension towards the Piazza San Marco basin. The two spaces together form the social, religious and political center of Venice and are jointly accepted together. This article is with both.
Sert emphasized that the use of the enclosed courtyard (patio) form at various scale levels could give an “underlying coherence” to each city plan. These scales ranged from the house to the neighborhood to individual public buildings to the
monumental city center; the last could be composed of a “series of gigantic piazzas (or big patios) that form places of outdoor assembly for all citizens.”
Also Lluis Sert had a thoughts about the urban idea. According to the The Human Scale in Urban Planning which wrote by Sert, he combining with elements of the Plan of London. He extended and developed direction beyond what Saarien had begun at Cranbook, putting new emphasis on existing pedestrian cities as cities sities for new housing for income levels, as well as places for new industrial facilities. With these ideas of urban design, Sert was attempting to retain the main values of CIAM. Sert also saw the pedestrian interaction issue in the cities. According to Sert such spaces were the only places where a civic culture could continue. He thought that its possible to resist centralizing of urban design.
Sert’s idea about the public individual spaces(big or small spaces like piazzas). That way also about the human scale in city which inspired by Le Corbusier. He emphasized that the use of closed courtyard (patio) form as various scale levels could an underlying coherence to each city plan. These scales ranged from the house to the neighborhoods to induvidual public building to the monumental city center. When we think that Sert’s approach we figure out typical American streets in now is contrasted his urban idea.