Claim: The oldest building in Atlantic House (located in Cape Cod, geographic cape extending into the Atlantic Ocean from the southeastern corner of mainland Massachusetts, in the northeastern United States) was constructed in 1798, and was operated as a tavern until it was purchased by Benjamin Allstrum, changing its name to the Allstrum House.
Evidence: The Atlantic House (often called the A-House, even in its own advertisements) in Provincetown, Massachusetts is a drinking establishment that has been in continual operation on the tip of Cape Cod for over two centuries. Cape Cod is a geographic cape extending into the Atlantic Ocean from the southeastern corner of mainland Massachusetts, in the northeastern United States. The oldest part of the building (now the left wing) was constructed in 1798 by Daniel Pease, Provincetown's first postmaster. Pease operated the building as a tavern although the name of the establishment at this time, if it had one, is uncertain. After Pease's death from cholera in 1834, the business was purchased by Benjamin Allstrum and became known as the Allstrum House.