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 in 1828 the Treaty of Montevideo, fostered by the British Empire, gave birth to Uruguay as an independent state. The political scene in Uruguay following its independence from Brazil became split between two parties, the conservative "Blancos" and the liberal "Colorados". The "Colorados" were led by Fructuoso Rivera and represented the business interests of Montevideo; the "Blancos" were headed by Manuel Oribe, who looked after the agricultural interests of the countryside and promoted protectionism. In 1838, the Kingdom of France started a naval blockade over the port of Buenos Aires, in support of the Peru–Bolivian Confederation, who had declared