Hotel de Montross (or Montross Hotel), Biloxi, Mississippi, ca. 1900, via Cooper Postcard Collection, Mississippi Department of Archives and History Commons on flickr.
Because of its waterfront location, Beloxi has been a summer resort town since the first half of the 1800s. The Hotel de Montross — facing the Mississippi Sound — was one of its oldest hotels. Today, it is long gone, with a Hard Rock Hotel and Casino located on approximately the same spot.
(There’s another picture of the hotel’s grounds here.)