En 1932 el entonces Papa Pío XI le eleva el rango a basílica y desde 1942 es declarada como un monumento histórico nacional.
Una curiosidad es que en 1740 se instala el reloj que aún hoy conserva y que fue el primer reloj en exhibirse en la ciudad.
The Basílica Nuestra Señora del Pilar can be found in the nieghbourhood of Recoleta. Contruction began in 1716 (under the auspicies of King Felipe V of Spain), and was meant as a monastery for the order of the "Recoletos" (hence the name of the area: Recoleta), and was finalized in 1732. It is the second oldest religious establishment in the city of Buenos Aires, and a clear example of Spanish colonial architecture.
In 1821, the local government expelled the order of the Recoletos from the country, and seized all of their properties. The church was therefore closed during this tie and its vegetable garden was then turned into a cemetery (The Recoleta Cemetery).
In 1932 the Pope Pío XI raised its status to that of a Basílica and since 1942 was declared as a national historic monument.
An interesting fact is that the clock that can be seen in the below photograph was the first clock to be installed in the city of Buenos Aires in 1740.