Monserrat or Montserrat is a neighbourhood in the east of the Buenos Aires. The district features some of the most important public buildings in Buenos Aires, including city hall, the city legislature, Casa Rosada, the Colegio Nacional de Buenos Aires and the Libertador Building (Ministry of Defense), among others. Avenida de Mayo runs through the Monserrat district, connecting Plaza de Mayo and the Plaza de los Dos Congresos (Congressional Plaza). A block, or two, south of the Plaza de Mayo, the older section of Monserrat begins. This is Buenos Aires’ oldest neighborhood and even today, very little of the cityscape there is less than a hundred years old (except along Belgrano Avenue), thereby making a nearly seamless transition to the likewise historic San Telmo district, to the south. Pan Shot. Full HD.