Trimountaine was the original name given by European settlers to the peninsula that would later be incorporated as the city of Boston. The name was derived from the three prominent hills on the peninsula, two of which were leveled as the city was modernized. The third, Beacon Hill, remains to this day a prominent feature of the Boston cityscape.
In 1628, the Cambridge Agreement was signed in England among the Puritans of the Massachusetts Bay Colony. The agreement established the colony as a self-governing entity, answerable only to the king. John Winthrop was its leader, and would become governor of the settlements in the New World. In a famous sermon, "A Model of Christian Charity," Winthrop described the new colony as "a City upon a Hill."
In June 1630, the Winthrop Fleet arrived in what would later be called Salem, which on account of lack of food, "pleased them not." They proceeded to Charlestown, which pleased them less, for lack of fresh water. The Puritans settled around the spring in what would become Boston.
Governor Winthrop announced the foundation of the City of Boston on September 17, with the place named after the town of Boston, in the English county of Lincolnshire, from which several prominent colonists emigrated.