The Palace of the Argentine National Congress (Spanish: Palacio del Congreso Nacional Argentino, often referred locally as Palacio del Congreso) is a monumental building, seat of the Argentine National Congress, located in the city of Buenos Aires. It is located in the barrio of Balvanera at its limit with Monserrat, an area informally known as the Congreso neighbourhood. Constructed between 1898 and 1906, the palace is a National Historic Landmark. The Kilometre Zero for all Argentine National Highways is marked on a milestone at the Congressional Plaza, next to the building. Zoom In. Full HD.