[1] The original home was built in 1720 and was listed as the property of Juan Garcia Martinez Gallegos on a 1764 map of St. Augustine.

By 1788, another map shows that original structure had been replaced by a timber-frame house built by Lucia Escalona.

They used authentic historical methods of construction, building the structure of an oyster-shell concrete mix known as tabby.

It demonstrates typical architecture of the First Spanish Period in that it has no entry from the street but rather through a courtyard on the side for security and privacy.

The Gallegos House served as the Information Center for the Preservation Board's museum village, San Agustin Antiguo.