According to history books that this place from the painting (bank of Ipiranga River) was where the independency of Brazil in 1822 was declared.
(public domain)
Very close to this historical site lies today the Ipiranga Museum in São Paulo.
Many locals and tourists visit the museum and its park inspired by French famous gardens such as the Versalles in Paris.
Currently the park is closed and having the museum being restaured.... this picture was taken last year. The museum is expected to be re-opened in 2022.
(picture: own files)