Photos

Motif Number 1, located on Bradley Wharf in the harbor town of Rockport, Massachusetts, is a fishing shack well known to students of art and art history as "the most often-painted building in America."
Built in the 1840s as Rockport became home to a colony of artists and fishermen, the shack became a favorite subject of painters due to the composition and lighting of its location as well as being a symbol of New England maritime life. Painter Lester Hornby (1882–1956) is believed to be the first to call the shack "Motif Number 1", a reference to its being the favorite subject of the town's painters, and the name achieved general acceptance.
The shack was destroyed during the blizzard of 1978, but an exact replica was constructed that same year.
(Source: Wikipedia)

Note: This is a 1968 photo, so it is a picture of the original shack!