The Congresso Nacional in Brasília, Brazil, is the legislative headquarters of the country, designed by Oscar Niemeyer and completed in 1960 as part of the city’s planned capital project. Located at the eastern end of the Eixo Monumental within the Praça dos Três Poderes, it features an iconic design with twin hemispherical domes—one convex for the Senate, one concave for the Chamber of Deputies—flanked by two high-rise towers. This modernist structure symbolizes Brazil’s bicameral legislature and is a key element of Brasília’s governmental core.