The National Flag Memorial in Rosario, Argentina, is a monumental complex built near the shore of the Paraná River. It was inaugurated on June 20, 1957, the anniversary of the death of Manuel Belgrano, creator of the Argentine flag, who raised it for the first time on an island on the opposite shore of the river on February 27, 1812.
The complex has a total area of about 10,000 square metres, and was built mostly using stone from the Andes, under the direction of architects Ángel Guido and Alejandro Bustillo, and the sculptors José Fioravanti, Alfredo Bigatti and Eduardo Barnes.
Wikipedia https://en.wikipedia.org/wiki/National_Flag_Memorial_(Argentina)
Official Website http://www.monumentoalabandera.gob.ar/
Address 555 Calle Córdoba, Rosario, Argentina
Coordinates -32°56'51.536" N -60°37'50.211" E