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The decisiveness of the right angle, which is uncommon in nature, would seem to exercise an irresistible appeal to the human mind, for it permeates man's art, artifacts, and architecture. That it should also appear as a basic organizational element in town plans over many centuries and in many cultures only confirms this appeal. The present work examines Greek, Etruscan, Italic, Hellenistic, and Roman cities that were based on orthogonal or grid plans - those characterized by streets intersecting at right angles to form blocks of regular size and spacing. Some of these have only recently been uncovered.The author suggests that the implementation of these plans may have constituted the first exercise in master planning for the future extension and development of cities. These goals doubtless varied in ancient times from the tyrannical - suggesting an authoritarian control with the power to order a population into a strict grid pattern - to the egalitarian - implicit in the essential uniformity and equality of the blocks regardless of location.In Roman times the orthogonal plan was to evolve into a quadrant system in which two broad streets at right angles served as the defining axes of the town, meeting to produce a formal central space, the origin of the coordinated city. These plans are discussed in the book, but the major emphasis is on Hippodamean layouts, in which a few - usually three or four - main parallel roads are intersected at right angles by numerous narrow streets to form long, narrow blocks.Hippodamean plans are named for Hippodamus of Miletus, a Greek of the fifth century B. C. Although in antiquity Hippodamus was believed to have devised this scheme, the author points out that such plans antedate Hippodamus by an extensive period and that his role was one of refining and further systematizing the plan. His chief contribution appears to be the application of his insight into political organization and social behavior to town planning.Indeed, Hippodamean plans go back at least to the seventh century B.C. in Greece, and rectangular elements basic to such plans have been found not only throughout the Mediterranean region but in Aztec, Indian, and Chinese cultures as well.A number of aerial photographs are juxtaposed with detailed plans prepared by archaeologists and provide a fascinating insight into the solutions that Hippodamus and other planners evolved in the process of adjusting the needs of urban settlements to the exigencies of the terrain.

Cities and towns, Ancient --- City planning --- Orthographic projection --- Villes antiques --- Urbanisme --- Projection orthogonale --- History --- Histoire --- Hippodamus, --- Geography, Ancient --- Cities and towns, Ancient. --- Hipódamo, --- Hippodamos, --- Hippodamus Milesius --- Ippodamo, --- Hippodamus, - of Miletus --- Ancient world --- Orthogonal town planning --- ARCHITECTURE/Urban Design

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City planning --- Streets --- Avenues --- Boulevards --- Thoroughfares --- Roads --- Cities and towns --- Civic planning --- Land use, Urban --- Model cities --- Redevelopment, Urban --- Slum clearance --- Town planning --- Urban design --- Urban development --- Urban planning --- Land use --- Planning --- Art, Municipal --- Civic improvement --- Regional planning --- Urban policy --- Urban renewal --- Government policy --- Management

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Cities and towns, Ancient --- Excavations (Archaeology) --- City planning --- Architecture, Egyptian --- Villes antiques --- Fouilles (Archéologie) --- Urbanisme --- Architecture égyptienne --- History --- Histoire --- Egypt --- Egypte --- Antiquities --- Antiquités --- Fouilles (Archéologie) --- Architecture égyptienne --- Antiquités --- Architecture, Ancient --- Cities and towns --- Civic planning --- Land use, Urban --- Model cities --- Redevelopment, Urban --- Slum clearance --- Town planning --- Urban design --- Urban development --- Urban planning --- Planning --- Government policy --- Management --- Antiquities. --- Civilization --- History. --- Land use --- Art, Municipal --- Civic improvement --- Regional planning --- Urban policy --- Urban renewal --- Geography, Ancient

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Mesopotamië, Egypte, Armenië, Israel, Jordanië, Syrië, Libanon --- Stedenbouw het Oude Nabije Oosten Midden-Oosten --- 71.032.2 --- Geschiedenis van de stedenbouw Oud-Egyptische --- Stedenbouw ; het Oude Nabije Oosten ; Midden-Oosten --- Geschiedenis van de stedenbouw ; Oud-Egyptische --- City planning --- Cities and towns --- Civic planning --- Land use, Urban --- Model cities --- Redevelopment, Urban --- Slum clearance --- Town planning --- Urban design --- Urban development --- Urban planning --- Land use --- Planning --- Art, Municipal --- Civic improvement --- Regional planning --- Urban policy --- Urban renewal --- Government policy --- Management

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A Diateichisma is part of a city ́s fortification system. Unlike a city wall it was built within the urban area dividing a city in two parts. This study focuses on two aspects. On the one hand, the phenomenon of diateichismata is considered as part of fortification architecture, on the other hand the influence of diateichism on the organisation of the urban space is pointed out. Furthermore, the reasons, why diateichismata were build are considered as a focal point of the study. The settlement are displayed in a catalogue, technical data is in charts. Written sources mentioning diatechisma are put together including relevant passages of the text. In scientific research diateichismata have been regarded as mere functional buildings, however, they have been studied systematically. In this study, the significance of diateichismata is analysed beyond the aspects of fortification; in particular, the impact of diateichismata on the development and utilisation of urban space is a spezial interest. A comparative analysis of settlements with diateichisma has needs of comparable criteria. The most applicable term, after which settlements with diateichisma can be discerned and put in order, is the chronological relation of diateichisma and city wall, because here chronology is the only variable giving valuable information on settlement development. Hence three variations of settlements with diateichisma can be discerned: 1. Settlements with diateichisma built together with the enceinte. 2. Settlements with secondarily but diateichisma. 3. Settlements with diateichisma which originate after expansion of walled urban space. Most of the studied settlements have diateichismata which were built after the enceinte (23 examples) or which origins from expansion of walled city space (19 settlements). Contemporaneous diateichismate are rare (14 settlements), only in a few cities the relation between diateichisma and city wall remains unclear. The earliest diateichismata be dated in late 7th cent. B.C., the latest was build in the middle of the 2nd cent. B.C. Within this chronological frame the highest concentration of diateichismata can be traced in classical and hellenistic times. The distriution of cities is spead from the Iberian Peninsula to Greek parts of modern Afghanistan (Graeco-bactria). Only any regions do show concentrations of settlements with diateichisma. In the Western Mediterranean there are more cities with secondarily built diateichisma, in the area of north-western Greek in a lot of cities the walled urban space was enlarged establishind diateichismata between the original city area and the newly acquired space. Generally, diateichismata serve as obstacles to enemies which conquered the enceinte already or as barrier wall for hostile parties fighting within the boundaries of the city wall. Despite of the clear military function only cities of military character have a diateichisma; there it always serves as a barrier wall protecting free space Meant to host soldiers when attacked. The predominate group of settlements with dateichisma are free poleis. Concerning poleis in Greek cities in a non-Greek environment, the significance of diateichismata gains more interest, envolving the conflicts of different ethnical groups. In these cities ("colonies") one can detect mostly enlargement of urban space with covers the period of the 5th to the middle 3rd centuries B.C. Probably this process is conneted with the moving of large groups of people by the Western Greek tyrants in late archaic classical times and with the renewed founding of cities in the 4th cent. B.C. Contrary of the processs of enlargement of city space, in some areas of the Western Mediterranean cities were diminished insize. Diateichismata have a deep impact on the organisation of the urban space and also have representative and determine function. In most cities diateichismata remain standing as a ruin, detached from their original function of a barrier wall, or they integrated in newly erected buildings. As barrier walls, however, they are always organisation of urban space and remain as a visible borderline between different city quaters. Most of these partitioned off areas were used as dwelling space, but also in quite a lot of settlements explicitly the trading harbour zones were separated and protected by a diateichisma. Only a few cities divided military areas. Generally, empty space seperated by diateichisma was kept free for people escaping when being attacked. A main reason or occasion to build a diateichisma is the development of sieging techniques from late classical times onwards, being accompanied by a regional declining population density. Hence, especially in late classic and hellenistic times the erection of a diateichisma is a proved method to protect a city. However, a regional visible contemporanous development of urban space, probably connected with regional economic upturns, shows that the phenomenon of cities divided by a diateichisma is not a uniform development of military architecture. Rather a diateichisma is a mirror of the economic and political situation of a settlement and in special cases also of a region.

City walls, --- Fortification, Greek. --- Cities and towns, Ancient --- Military architecture --- Architecture, Greek --- Fortification --- Excavations (Archaeology) --- Interior walls --- City planning --- Cities and towns --- Civic planning --- Land use, Urban --- Model cities --- Redevelopment, Urban --- Slum clearance --- Town planning --- Urban design --- Urban development --- Urban planning --- Land use --- Planning --- Art, Municipal --- Civic improvement --- Regional planning --- Urban policy --- Urban renewal --- Walls --- Fortification, Primitive --- Forts --- Military engineering --- Siege warfare --- Greek architecture --- Architecture --- Architecture and war --- Greek fortification --- Classical antiquities --- Village walls --- History. --- Government policy --- Management --- Greece --- Antiquities. --- City walls --- Villes fortifiées --- Fortifications grecques --- Villes antiques