The Palacio Cousino was built between 1870 and 1878 for Isidora Goyenechea who was a wealthy coal widow.

A fire in 1968 bought the official guest residence for state visits to an end.

In 1977 the house was opened as a museum and now serves as a monument to turn-of-the-century European craftsmanship.

It was declared a National Monument in 1981.