Prior to 1808, the Bulfinch Triangle area was known as Mill Pond, and assumed the form of a tidal wetland, isolated from the Charles River to the north by a dam and grist mill. The Bulfinch Triangle is one of Boston's oldest landfill projects, planned by and named for the influential Boston architect, Charles Bulfinch. Charles Bullfinch came from a wealthy Boston family. Educated at Harvard; traveled throughout Europe between 1785-1787 where he was advised by Thomas Jefferson. Involved in the planning of much of old Boston. Some of his famous buildings are: the Massachusetts State House, the Otis House, Faneuil Hall, Massachusetts General Hospital, and Harvard University Hall. The site was opened to development through the Mill Pond Plan of 1808, and ninety-seven factories were established in the Triangle by 1867, representing such trades as blacksmiths, marble works, spice mills, and machine shops. This historic neighborhood has seen dramatic changes and it currently undergoing another revival.