54325 Main Road

PO Box 1

Southold, NY 11971








Prince Building:

54325 Main Rd., Southold NY 11971

Museum Complex:

55200 Main Rd., Southold NY 11971

Nautical Museum at Horton Point Lighthouse:
3575 Lighthouse Rd., Southold NY 11971

Prince Building Hours:

Society Office: Monday—Friday 10am-2pm
Gift Shop: Monday—Friday 10am-2pm

Archives: By Appointment


Treasure Exchange: 

April 1st through Mid-December    

Tues., Thurs., Fri., Sat., 10am–4pm

Wednesday 1-4pm


January through March             

Saturdays only, 11 am–3 pm

©2019 Southold Historical Society

Bainbridge Memorial Internship

The Bainbridge Memorial Internship honors a former board member and supporter of the Historical Society, Mildred Bainbridge (1907-1992).


Born in Brooklyn, Long Island, Mildred Bainbridge was the daughter of Ella (1882-1954) and Henry C. Bainbridge Jr. (1882-1956). The Bainbridge family were the proprieters of the Charles T. Bainbridge & Co., founded in 1867, who were noted for their artists materials, including "Bainbridge Board." The family lived in Brooklyn at 183 St. James Place and at a summer place in Cutchogue, located on New Suffolk Avenue, just west of Downs's Creek. Henry's brother, Lawrence Bainbridge, also owned a nearby summer estate, located on Nassau Point, named "Sunset Meadows."


Mildred Bainbridge was a member of several clubs and organizations in Brooklyn, particularly the Apollo Club, where her father served several terms as president. Mildred worked as a counseler at Camp Quinnebeck in Vermont prior to attending Boston University, where she received a B. S. in Education. She never married and was the last member of the Bainbridge family to serve as president of the company. In 1984 Bainbridge united with the Nielsen company to become Nielsen-Bainbridge, one of the world's largest suppliers of mat board and other art related products.


At the time of Mildred Bainbridge's death in 1992 she left her large estate, valued at over five million dollars, to a variety of charities on the North Fork, including the Southold Historical Society. The Society honors her generous gift through the annual awarding of the internship in her name.


For more information, please contact us.