175 Park Avenue includes a mixed-use tower at 1,646 feet tall (500 meters), contains office and retail spaces, and a new 500-room hotel managed by hoteliers Hyatt. The glass and steel tower will replace the Grand Hyatt New York, originally built in 1919 as the Commodore Hotel and purchased in 1980 by Trump. Skidmore Owings and Merril (SOM) plans to use the project to replace Trump's "overbearing" design by rectifying overcrowding on the pavement and building a clear path between 175 Park Avenue and the nearby Grand Central Terminal. The skyscraper will feature a stone-clad core enclosed by an outer layer of glazing and structural steel columns. These columns will run parallel up the sides of the tower, crisscrossing over to form a decorative lattice at the top and bottom.