It included the second largest concert hall in New York City as well as showrooms for Steinway pianos. To enter the concert hall concertgoers had to pass through the showrooms, a way to advertise Steinway pianos. Sales increased by more than 400 pianos in 1867. Steinway Hall quickly became one of New York City's most prominent cultural centers, housing the New York Philharmonic for the next 25 years until Carnegie Hall opened in 1891. In 1925, the Steinway Hall on East 14th Street was closed and a new Steinway Hall on West 57th Street was opened. In 2013, Steinway sold the Steinway Hall on West 57th Street for $46 million and moved out of the building at the end of 2014. In 2016, a new Steinway Hall opened on Sixth Avenue. A second Steinway Hall was opened in London in 1875. It was located first on Wigmore Street, in 1924 it moved to St. George Street, and later it moved to its current address on Marylebone Lane. In 1857, Steinway began to make a line of art case pianos, designed by artists. In 1903, the 100,000th Steinway grand piano was given as a gift to the White House; it was decorated by the artist Thomas Wilmer Dewing. The 100,000th Steinway grand piano was replaced in 1938 by the 300,000th, which remains in use in the White House. The piano is normally placed in the largest room of the White House, the East Room. Later, Steinway diversified into the manufacture of player pianos. Several systems such as the Welte-Mignon, Duo-Art, and Ampico were incorporated. During the 1920s, Steinway had been selling up to 6,000 pianos a year. In 1929, Steinway constructed one double-keyboard grand piano. It has 164 keys and 4 pedals. (In 2005, Steinway refurbished this instrument). During World War II, the Steinway factory in Queens received orders from the Allied Armies to build wooden gliders to convey troops behind enemy lines. Steinway could make few normal pianos, but built 2,436 special models called the "Victory Vertical" or "G.I. Piano". It was a small piano that four men could lift, painted olive drab, gray, or blue, designed to be carried aboard ships or dropped by parachute from an airplane to bring music to the soldiers. The factory in Hamburg, Germany, could sell very few pianos during World War II.