Museo Naval Casa Grau, Naval and house museum on Huancavelica Street, Lima, Peru.

Museo Naval Casa Grau is a house museum in a colonial building on Huancavelica Street displaying two floors of restored period rooms. The house preserves furniture, personal objects, and naval collections that illustrate the life of an influential family during the 19th century.

The house is an 18th-century colonial building where Miguel Grau Seminario, a Peruvian naval officer and hero of the Pacific War, lived with his family for twelve years. It later became a museum devoted to his life and to the naval battles fought between Chile and Peru in 1879-1881.

The house carries the name of Admiral Miguel Grau, whose life is documented here through personal belongings and ship models. Visitors can observe how a wealthy family lived during Peru's republican period and connected with the nation's maritime history.

The museum occupies an 18th-century two-storey colonial house with a large wooden balcony, in the Cercado de Lima near the Plaza Mayor and the San Francisco convent. The rooms are arranged over two floors, with period-decorated interiors and the naval battle pieces on display. Visits are possible every day except Monday, from 9 am to 5 pm.

Miguel Grau Seminario lived in this house for twelve years with his family. Inside, a replica of the seat he occupied as deputy for Paita is displayed, alongside personal objects arranged in rooms decorated to match the period.