In 1910, the Chesapeake & Ohio Railway purchased the resort property, building additional amenities, including the current bath wing, which opened in 1911. The C&O's improvements culminated with the construction of a colossal six-story, 250-room hotel building, which forms the central wing of today's hotel. Designed by British-born American architect Frederick Julius Sterner, it opened on September 25, 1913. At this time, what had for decades been a summer establishment was converted to a year-round resort, and the name was officially changed to The Greenbrier, after the neighboring county. The neighboring town had incorporated in 1909 and adopted the name White Sulphur Springs, which the resort had previously used. The railroad also introduced the game of golf, which became a defining feature of the resort. The first small course was opened in 1910, and a full 18-hole course, designed by Charles B. Macdonald, opened at The Greenbrier in 1913. That original course is today known as "The Old White TPC". The historic Old White Hotel structure was demolished in 1922 because it failed to meet then-current fire codes. In 1931, completion of the north wing, crossing the original 1913 wing like a "T", nearly doubled the size of the hotel.