The Plaza de Miserere is one of the main plazas of Buenos Aires, Argentina. It is located in the heart of the Balvanera neighborhood. It was supposed to be the name of the Line A—Buenos Aires Metro station located below it, but the station is more popularly known as Plaza Once, and is located alongside the Once de Septiembre Station of the Ferrocarril Domingo Faustino Sarmiento (Sarmiento railroad).
The plaza lies on the former site of a mansion known as the Quinta de Miserere. Around 1814, it was known as Mataderos de Miserere (Slaughterhouses of Miserere), Hueco de los corrales (Hole of the corrals) in 1817, and Mercado del Oeste (Western Market) by 1850. It was also known as Mercado (or Plaza) 11 de septiembre (11th of September Market or plaza); the name Plaza Miserere dates from 1947.
The plaza was the site of skirmishes during the British invasions of 1806. It was the site of the defeat of the troops under Santiago de Liniers during the second invasions of 1807.
The market functioned until 1882, when Mayor Torcuato de Alvear began the demarkation of the plaza. In 1913, it underwent an important remodeling when the Buenos Aires Metro station was built underneath.
The current design is from 1923, the mausoleum of Bernardino Rivadavia, the first Constitutional President of Argentina, was added in 1932, where his ashes remain despite his wish that they not stay in Argentina.