 Among the documents produced by the republican regime, stand out the entry records of immigrants, patents of inventions, books of civil registry, civis and criminal proceedings, sightings of UFOs, urbanization and sanitation projects related to the first years of the 20th century.The constitutions from the year 1891, the processes of the National Security Court, the Supreme Military Court and the Supreme Federal Court, the censorship bodies, the documents of entities such as the National Information Service, which compose the repressive apparatus to the Political struggles of the Military Dictatorship (1964–1985) and several other governmental institutions reflect the formation of contemporary Brazil and relevant aspects of the country's recent history.In addition to the documents of the information and counter-information body of the military regime, personal archives and private entities are important, including Eusébio de Queirós, Duque de Caxias, Bertha Lutz, Luis Carlos Prestes, Salgado Filho, San Tiago Dantas, Goes Monteiro, Apolônio de Carvalho, Mário Lago, Zelia Pedreira Abreu Magalhães, Maria Beatriz Nascimento, the presidents of Republic Floriano Peixoto, Prudente de Moraes, Afonso Pena, João Goulart, the Brazilian Academy of Letters, the Brazilian Federation for Female Progress, the Institute of Pesquisa e Estudos Sociais (IPES) and the Association of Brazilian Archivists.