The Texas School Book Depository (now the Dallas County Administration Building) is the former name of a seven-floor building located on Dealey Plaza in downtown Dallas, Texas (USA). Its address is 411 Elm Street, Dallas, TX 75202-3317 and is located on the northwest corner of Elm and North Houston Streets at the western end of Dallas' Central Business District.
In 1963, the building, originally constructed in 1901, was in use as a multi-floor warehouse for the storage of school textbooks and related materials and an order-fulfillment center by a private business of the same name. On November 22, 1963, Lee Harvey Oswald, a 24-year-old former Marine who was working as a holiday-rush temporary employee at the building, fired rifle shots from the sixth floor of the Depository into the Presidential motorcade of John F. Kennedy, killing the President, who was rushed to nearby Parkland Memorial Hospital. The conclusion of law enforcement at the time, including the FBI, and later three government investigations over the span of 30 years, including the Presidentially-appointed Warren Commission, was that Oswald acted alone.
The Texas School Book Depository Company moved out in 1970 and the building was purchased in 1977 by the government of Dallas County After renovating the lower five floors of the building for use as county government offices, the Dallas County Administration Building was dedicated on March 29, 1981. On President's Day 1989 the sixth floor opened to the public (for an admission charge) as a museum of the assassination, known as The Sixth Floor Museum On President's Day 2002 the seventh floor gallery opened.