The study of the post-Communist towns of East Europe and Russia does not only present the social sciences with the opening of a new field and the attraction of exoticism close at hand. They are a remarkable observatory of the complex relations which unite the material facets of urban life (extension of the built-up area, architectural forms, types of distribution of infrastructures and services) and the social structures (mode of government, nature of the economic initiative, expressions of sociability). In three-quarters of a century for Russia, in fifty years for the countries of East Europe, cities many ages old were to have two changes of system: from liberal industrial capitalism to the controlled Communist economy, from interventionist autarchy to the globalized market. To give the lie to the poet (Baudelaire), towns change no faster than the hearts of mortals but beat to the rhythm of their continuities, their aspirations and their dreams.