Offset to the southeast corner, the stone fireplace measures square at the base. It features four main hearths, one on each face, with smaller hearths, each with a flue, at the corners. The stone extends to the roof, and until it was damaged by earthquake, a brick flue extended above the roof, covered in log cribbing. An ironwork clock decorates the north face of the upper chimney in the lobby. The fireplace is centered in a shallow depression in the lobby floor that sets the area around its hearths apart from the rest of the lobby. Custom ironwork, most notable in the main entrance door and the clock, was forged at the site by an ironmonger named Colpitts.