The study focused on the factory colony of the mine „Jiří“ in Moravská Ostrava, by now only marginally reflected upon by the regional historians, does not aim to be a monograph dealing with the history of one of the rough number of 55 miners‘ colonies on the territory of contemporary Ostrava. The study of the colony of „Jiří“ that existed from the year 1872 or 1889 to the year 1970 was motivated, first, by the author’s interest in the proletarian colonies in Ostrava. But it also constitutes part of the research project begun in the year 2010. The research should culminate at producing a modern topography of miners‘ colonies of Ostrava that would replace the problematic topography of Jaroslav Bílek (1966). The study of the colony of „Jiří“ aims to refute the myth of its foundation before the year 1860, to describe in detail its constructional- architectonic development and the living standard, positively resolve the problem of the number of houses in the colony, and especially to remind the fact, unique in the region of Ostrava, of the double foundation of the colony in the years 1871 and 1888. Besides the general information concerning the setting and surroundings of the colony of „Jiří“ and its civic amenities, the study should provide the correction of the data on the population development of the colony in the years 1890–1910 presented in the thesis of Drahoslava Dušková (1976).