This structure was built between 1788 and 1792 by Ezekiel Merrill, a veteran of the American Revolutionary War who had been granted the land for his service.

The main facade is a five-bay center-entry configuration typical of the period, although it has been embellished with a Queen Anne portico.

Poor (1808-1871), a lawyer and businessman who was instrumental in the development of the railroad in Maine, particularly the Grand Trunk Railway.

Henry purchased the family homestead from relatives in 1890, and transformed the property into a summer estate, working in consultation with architect Edward Clarke Cabot and landscape designer Frederick Law Olmsted.

The largest addition, however, was the construction of a great hall in 1896, a massive two-story structure built on the site of the old barn.