Richard Morris Hunt (renovations) Chateau-sur-Mer is one of the first grand Bellevue Avenue mansions of the Gilded Age in Newport, Rhode Island.

Chateau-sur-Mer was completed in 1852 as an Italianate villa for William Shepard Wetmore, a merchant in the Old China Trade originally of St. Albans, Vermont.

During the 1870s, the Wetmores departed on an extended trip to Europe, leaving architect Richard Morris Hunt to remodel and redecorate the house in the French Second Empire style.

Hunt's alterations greatly expanded the house, adding a new three-story wing, a porte-cochere, and a projecting four-story tower with mansard roof.

He was a member of the Electoral College of 1880 and again in 1884; he was elected Governor of Rhode Island in 1885 and went on to win re-election in 1886, but he was defeated in an attempt for a third term in 1887.