Rosecliff is a Gilded Age mansion of Newport, Rhode Island, now open to the public as a historic house museum. The house has also been known as the Hermann Oelrichs House or the J. Edgar Monroe House.

It was built 1898–1902 by Theresa Fair Oelrichs, a silver heiress from Nevada, whose father James Graham Fair was one of the four partners in the Comstock Lode. She was the wife of Hermann Oelrichs, American agent for Norddeutscher Lloyd steamship line. She and her husband, together with her sister, Virginia Fair, bought the land in 1891 from the estate of George Bancroft and commissioned the architectural firm of McKim, Mead, and White to design a summer home suitable for entertaining on a grand scale. With little opportunity to channel her considerable energy elsewhere, she "threw herself into the social scene with tremendous gusto, becoming, with Mrs. Stuyvesant Fish and Mrs. O.H.P. Belmont (of nearby Belcourt), one of the three great hostesses of Newport."

The principal architect, Stanford White, modeled the mansion after the Grand Trianon of Versailles, but smaller and reduced to a basic "H" shape, while keeping Mansart's scheme of a glazed arcade of arched windows and paired Ionic pilasters, which increase to columns across the central loggia. White's Rosecliff adds to the Grand Trianon a second storey with a balustraded roofline that conceals the set-back third storey, containing twenty small servants' rooms and the pressing room for the laundry.

The commission was given to McKim, Mead, and White in 1898, and the New York branch of Jules Allard and Sons were engaged as interior decorators. Construction started in 1899, but the sharp winter slowed construction; Mrs. Oelrichs' sister had married William K. Vanderbilt II that winter season, and the house was required for parties in the following Newport season; the eager Mrs. Oelrichs moved in July 1900, sending the workmen out in order to give a first party in August, a dinner for one hundred and twelve to outdo Mrs. Stuyvesant Fish's Harvest Festival Ball at Crossways. Ferns and floral arrangements concealed the unfinished areas. The house was not completed until 1902.

Rosecliff's brick construction is clad in white architectural terracotta tiles. Stanford White's sophisticated spatial planning offered unexpected views en filade through aligned doorways centered on handsome monumental fireplaces with projecting overmantels.

The central corps de logis is entirely taken up with the ballroom as it appeared on White's plans which, with the Louis XIV furniture removed, could serve as Newport's largest ballroom at 40 by 80 feet (12 by 24 m). Its scheme of single and paired Corinthian pilasters alternating with arch-headed windows and recessed doorways echoes the articulation of the exterior. This is reached through the French doors on either side, to a plain terrace dropping by broad stairs to the lawn facing the ocean, or to a planted terrace garden with a central fountain.

In the northernmost of the wings that project from both sides of the central block, is a dining room and a billiard room separated by a marble anteroom backed, on the service side, by a butler's pantry with two dumbwaiters. These communicate with the all-but-subterranean kitchens below which were lit, invisibly, from the sunken service yard on the north side of the house. The main entrance, on the opposite south wing, is through a vestibule where the exterior Ionic order is carried inside, now suitably enriched, under an emphatic cornice that divides the height 2:3.

The vestibule is separated, by a tripartite screen with an arched central opening flanked above the cornice by bull's-eye openings in which baroque vases stand, from a grand Stair Hall. The Stair Hall projects from the south block to accommodate a grand staircase that sweeps forward through a heart-shaped opening into the floor space. This divides at a landing to return in matched recurving flights to the upper floor.