The article is about the importance of the Aguirra Archives, a documental collection produced, gathered and organized by João Batista de Campos Aguirra (1871-1962), as a source of information about the territorial formation of São Paulo. This collection, acquired by Museu Paulista in 1962, was used in the researches which resulted in the text Territorial, urbanization and patrimony configuration: Glória's Colony (Colônia da Glória) (1876-1904), master-degree dissertation at FAU-USP. The organization of some of these Archives' series data, through a computerized data bank, helped in the interpretation of the tendencies of land alterations in the area of Glória in the end of the 19th century, with distinction to: the identification of landlords and of relevant estate businesses; the settlement of the concentration and land division phases; the valorisation of these properties.
São Paulo; Collections; Museu Paulista; Urban territorial formation