Museu do Comando Militar do Sul, Military museum in Porto Alegre, Brazil.

The Museu do Comando Militar do Sul occupies a two-storey 1867 building on Rua dos Andradas, planned by Captain Antonio Dias da Costa as an annex to the Provincial War Arsenal. Two austere opposite facades are joined by single-storey wings around a large open central courtyard, now covered with translucent tiles that shelter the vehicles displayed there.

The building was designed in 1860 by Captain Antonio Dias da Costa as an annex to the War Arsenal, and its first section opened in November 1867 under Lieutenant-Colonel Joaquim Jerônimo Barrão. The Arsenal stayed until 1935, after which various military units occupied it. In 1994 General João Carlos Rotta began gathering arms and equipment, and the museum opened on 25 May 1999; it moved to Rua dos Andradas 630 in 2001.

The exhibitions show how military institutions shaped daily life and community practices in southern Brazil through displays and educational activities. Visitors can see how these organizations influenced local traditions and social structures over time.

The museum opens on most weekdays and offers guided tours for visitors who want more detailed information. It is worth checking ahead about any special programs or current exhibitions.

The museum holds a specialized collection of documents and photographs that record regional conflicts and peacekeeping missions over time. These archives contain details that are difficult to find elsewhere and offer a perspective on local history not commonly seen.