The Mercantile Building, 10 East 40th Street. NY

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10 East 40th Street is a skyscraper located in the Murray Hill section of New York City, between Fifth Avenue and Madison Avenue, taking the width of the block between 40th and 39th Streets. Designed by Ludlow & Peabody and built by Jesse H. Jones, it was finished in 1929 and is considered part of the art deco school of architecture. When it was built, it was the fourth-tallest tower in the world.It was previously known as the Chase Tower, after its first tenant, Chase Brass & Copper. Its owner until his death in 1938 was Frederick William Vanderbilt. On November 14, 2007, the building became the final site to be removed from Thomas Edison's original direct current grid in New York City.Today, some refer to the building as "the Napa Building", a reference to its long-time tenant Napa Group, Inc., the world's leading provider of software for the short-term adjustable rate marketplace.