and it preserved some of the original decorations from the Plaza Restaurant, including paneled pilasters and a beamed ceiling. Other features, including the mosaic floor and a crystal chandelier, were added by Warren and Wetmore. The 58th Street entrance has three elevators and adjoins what was formerly a women's reception room. West of this lobby is a staircase leading up to a mezzanine-level corridor, which has marble floors and ashlar walls and abuts the Terrace Room's balcony to the north and a foyer to the south. The mezzanine-level foyer has marble floors, a painted coffered ceiling supported by two square columns, and a bank of two elevators to the ballroom on floor 1. A marble staircase, with a marble and wooden balustrade, leads from the mezzanine foyer to the ballroom level. The layout of the upper floors was based on the layout of the ground-floor hallways, because all the stairways and elevators were placed in the same position on upper floors. On floor 2 and all subsequent stories, a centrally located C-shaped corridor runs around the north, east, and south sides of the building and connects every room. Ground-floor restaurants The Oak Room, on the western part of the ground floor, was built in 1907 as the bar room. It is west of the Central Park South foyer, separated from the foyer by a corridor. Compared to other spaces in the hotel, it retains more details from the original design. The Oak Room was designed in a German Renaissance style, originally by L. Alavoine and Company. It features oak walls and floors, a coved ceiling, frescoes of Bavarian castles, faux wine casks carved into the woodwork, and a grape-laden brass chandelier. The eastern wall contains a gridded glass double door leading to the main hallway, while the northern wall contains two openings to the Oak Bar. The Oak Bar is just north of the Oak Room, at the northwest corner of the ground floor. It is designed in Tudor Revival style with a plaster ceiling, strapwork, and floral and foliage motifs. The bar room contains walnut woodwork with French furnishings. It also has three murals by Everett Shinn, which were added in a 1945 renovation and show the neighborhood as it would have appeared in 1907. Prior to the renovation, the Oak Bar served as a brokerage office. The Edwardian Room, previously known as the Men's Grill or Fifth Avenue