Museu Barão de Mauá, History museum in Mauá, Brazil.

The Museu Barão de Mauá occupies an 18th-century bandeirista house on Avenida Doutor Getúlio Vargas, 276, in Vila Guarani, Mauá. The building was constructed in taipa de pilão (rammed earth), and CONDEPHAAT describes it as a "preciosidade remanescente do período Bandeirista." Its rooms hold photographs, objects and documents on the city's history.

The house was built in the early 19th century on the Tamanduateí floodplain for Lieutenant Francisco Barbosa Ortiz, using rammed earth. The Baron of Mauá, Irineu Evangelista de Souza, bought the Bocaina estate in April 1862 and likely used the house until 1867. It later sheltered several families before becoming a museum on 27 December 1983.

The house's name comes from Baron of Mauá, Irineu Evangelista de Souza, who bought the Bocaina farm in April 1862, though he probably never visited. In the 1850s, housekeeper Maria Queiroz Pedroso promised an image of Nossa Senhora da Imaculada Conceição to the owner, donated land for the Igreja Matriz, and the city's patron saint day is still celebrated on 8 December.

The museum sits at Avenida Doutor Getúlio Vargas 276, in the Vila Guarani area of Mauá. It opens Monday to Friday from 9am to 4pm and Saturday and Sunday from 10am to 4pm, with free admission. Guided visits can be booked on site.

The house was built with taipa de pilão, rammed earth packed into wooden forms, as stated in the source. The same source notes that the building was demolished in 1976 for the Juscelino Kubitschek Viaduct, so the present museum occupies a different structure. The name Barão de Mauá is honorary: the baron probably never visited the house.