sentences:  Its name alludes to the date (25 May 1810) of the May Revolution, which led to the establishment of the first local Argentine government in Buenos Aires.Before 1852, when this name was adopted, it was simply called "Plaza Principal" ("Main Square").Plaza 25 de Mayo is located on the eastern edge of the present-day downtown area, not far from the Paraná River, and occupies the block defined by Santa Fe St., Buenos Aires St., Laprida St. and Córdoba St.. East of the plaza lie the seat of the executive branch of Rosario's municipal government, called Palacio de los Leones, and the Basilica Cathedral of Our Lady of the Rosary, seat of the Archdiocese of Rosario.