Arquivo Histórico Ultramarino Arquivo Histórico Ultramarino The Arquivo Histórico Ultramarino (est. 1931) of Portugal preserves archives related to the Portuguese Empire. It is located in the on da Boa-Hora in the city of Lisbon, near the in the parish of Alcântara. The of the governmental Ministry of Science, Technology and Higher Education administers the archives. Prior to 1973, the Overseas Ministry oversaw it. Among its holdings are records created in 15th-20th century related to colonial Angola, Brazil, Cape Verde, Guinea, India, Macau, Mozambique, São Tomé and Príncipe, Timor, Uruguay, and other locales. As of 1970 the materials were grouped as pre-1833 (mostly from
Brazil–Uruguay relations and the subsequent creation of the "Província Cisplatina", and Uruguay's independence from Brazil in 1828. The bilateral relationship was further defined by the Uruguayan Civil War (1839–1851) and the Paraguayan War (1864–1870). Relations during the late-19th to late-20th centuries were overshadowed by domestic politics and resulted in a period of distancing between the two countries. The signing of the Treaty of Asunción in 1991 initiated a period of closer political, economical and cultural ties. Today, the Brazilian government defines Uruguay as a strategic ally and places the bilateral relationship as a foreign policy priority. This is met with reciprocity by