Islamic society is ever intriguing. Across broad territories and over millenia oftime, it maintains a constant identity; yet it is always elusive, varied, andchanging. The study of Islamic urbanism, like so many Islamic topics, oscillatesbetween attempts to define what is fundamental and universal in Islamic citylife, and what is ineffably individual about each locality; the contradictoryperspectives seem equally valid. While topography, culture, and history havegiven each locality a unique identity, by the middle ages, Middle Eastern townsbetween the Nile and the Jaxartes—the core area of Islamicsociety—shared common features of social organization. Small communities,such as families, neighborhood quarters, and fraternities were the fundamentalunits of society. Town populations were gathered into loosely organizedreligious bodies, such as schools of law, Shirite sects, and Sufi brotherhoods,who were dominated by ethnically alien elites organized into slave armies andslave-maintained governments, and who garrisoned and extracted revenues from thetowns while remaining separate from local community life. Characteristically,then, Middle Eastern Muslim cities operated on three levels-parochial groups,religious communities, and imperial regimes. Organized urban life depended onthe relationships between person and groups within this three-tieredinstitutional pattern.