In 1891 he resigned his post in support of the congressional side of the 1891 Chilean Civil War against then president José Manuel Balmaceda.

In 1883, the Marquis Melchor de Concha y Toro entered the wine-making industry by deciding to plant grapevines in the Maipo River valley.

He brought seeds to Chilé from the Bordeaux region of France and hired a French ethnologist Monsieur Labouchere.

The mansion stands out by its extensive gardens and its rural Chilean style as well as some French touches.

His granddaughter, Olivia, reclaimed the family nobility titles of marquess of Casa Concha and Rocafuerte.