During the early years of European settlement, the future site of Haymarket Square was in a part of Boston Harbor called Mill Cove.
[2]: 74 Several mills and rum distilleries, powered by tidal water flows, were built on the shores of the pond.
[5]: 120 At the same time, population growth led town officials to look for ways to increase the supply of buildable land.
[5][2]: 84 The future location of Haymarket Square, where Merrimack, Canal, and Charleston Streets converged at the southern tip of the Bulfinch Triangle, appears on an 1826 map.
[17] According to an 1892 guidebook, "The Boston and Maine Railroad, alone of all lines entering the city on the north side, enjoys the privilege of penetrating within the outer street.
Workers excavating for the station and incline uncovered a portion of the wall of the Middlesex Canal, which formerly terminated at the square.
Architectural critic Robert Campbell wrote in 1992 that the former site of the Relief Station resembled "a shell-torn battlefield.
[22] Construction began in January 2017[23] on Bulfinch Crossing,[24] a 2.9 million square foot redevelopment on the site of the Government Center Garage.