Elizabeth Parke Custis Law, sometimes known as Eliza Law, was the eldest granddaughter of Martha Dandridge Washington and a step-grandchild of George Washington. She married Thomas Law, the youngest son of the late bishop of Carlisle, England, and an experienced administrator with the East India Company.

The Thomas Law House (Honeymoon House) was constructed between 1794 and 1796 near present-day 6th and N Streets, Southwest in Washington, D.C. The builder was a syndicate headed by James Greenleaf, an early land speculator in the District of Columbia.