The Lisbon Military Museum is a Portuguese military museum located in the heart of the city of Lisbon. It is housed in a historic building that was once a barracks and was transformed into a museum in the mid-twentieth century. The museum's collection includes a wide range of military artifacts, including weapons, uniforms, medals, and other memorabilia from the Portuguese military from the 12th century to the present day.

Visitors can explore the museum's collections through a series of galleries and displays. Among the highlights of the collection are a range of antique firearms and swords, examples of military uniforms from different periods, and medals and other decorations awarded to Portuguese soldiers throughout history. The museum also features a section dedicated to Portugal's role in the Napoleonic Wars, with a range of artifacts related to that period of history.

In addition to its permanent collections, the Lisbon Military Museum also hosts a range of temporary exhibitions throughout the year. These exhibitions may focus on particular periods or aspects of Portuguese military history, or may showcase the work of contemporary artists whose work is related to military themes.