In 1961, the Pennsylvania Railroad unveiled plans to tear down the old Penn Station and replace it with a new Madison Square Garden and office building complex. Organized protests were aimed at preserving the McKim, Mead & White-designed structure completed in 1910, widely considered a masterpiece of the Beaux-Arts style and one of the architectural jewels of New York City. Despite these efforts, demolition of the structure began in October 1963. The loss of Penn Station—called "an act of irresponsible public vandalism" by historian Lewis Mumford—led directly to the enactment in 1965 of a local law establishing the New York City Landmarks Preservation Commission, which is responsible for preserving the "city's historic, aesthetic, and cultural heritage". The historic preservation movement triggered by Penn Station's demise has been credited with the retention of some one million structures nationwide, including over 1,000 in New York City. In 2017, a multibillion-dollar rebuilding plan was unveiled to restore the historic grandeur of Penn Station, in the process of upgrading the landmark's status as a critical transportation hub.