Juan B. Castagnino Fine Arts Museum

The Juan B. Castagnino Fine Arts Museum is an art museum in the city of Rosario, province of Santa Fe, Argentina, considered the most important of the interior of the country and the second in national terms. It is administered by the municipal government. The museum lies within the Parque de la Independencia immediately outside the city center, at the intersection of Oroño Boulevard and Pellegrini Avenue.

The building was a project by architects Hilarión Hernández Larguía and Juan Manuel Newton and opened in 1936. It was donated to the Municipality by Mrs. Rosa Tiscornia de Castagnino in memory of her late son Juan Bautista Castagnino, an important art critic and collector at the time, and officially inaugurated as a museum on 7 December 1937.