The musée national de Port-Royal des Champs is an art museum situated at the place of the former Port-Royal-des-Champs Abbey in the commune of Magny-les-Hameaux, in Yvelines.

[1] The museum features 17th and 18th-century paintings and engravings, including a series that depicts the religious life of the former abbey.

Visitors can also explore the 30-hectare estate which includes the ruins of the abbey and a 13th-century dovecote.

In 1952, the State bought the building called Petites écoles and its extension.

Since 1953, the museum organization was left in Bernard Dorival's care.