The Bristol National Bank, organized by John H. Sessions and Charles S. Treadway, was chartered in 1875. Sessions was president until his death in 1899 and was succeeded by Treadway, who died in 1905. The bank occupied a building on Main Street, built in 1877-1878, until a new building (245-247 Main Street), built in 1904-1905, was ready for occupancy in August, 1905. The 1878 building was then demolished, as the Hartford Courant described the plans on March 31, 1904, “so that the bank will have an open space between it and the driveway which goes to the freight depot of the “Consolidated” railroad.” As the Courant described the new building on August 3, 1905:
The bank building occupies one lot north of the old bank on Main street, which was erected in 1878. It has a liberal frontage on Main street and is two stories high. The construction is of Roman brick with white marble trimmings and in front are four large pillars. There are two floors; the first is used exclusively by the bank and the second contains the law offices of Judge Roger S. Newell, William J. Malone, the probate court rooms, and the patent law department of the New Departure Manufacturing Company, which occupies three rooms.
The building was designed by Theodore Peck and built by the Torrington Building Company. In 1922, the bank moved again, this time to a new building, located further south on Main Street.