This Warren & Wetmore–designed 1929 landmark was intended to match neighboring Grand Central Terminal in bearing, and succeeded, with a gold-and-copper roof topped with an enormous lantern (originally housing a 6,000-watt light) and distinctive dual archways for traffic on Park Avenue. The building's history gets quirky. When millionaire real estate investor Harry Helmsley purchased the building in 1977, he changed its name from the New York Central Building to the New York General Building in order to save money by replacing only two letters in the facade (only later did he rename it after himself). During a renovation the following year, however, he actually gilded the building, applying gold paint even to limestone and bronze—it was removed by a succeeding owner. In 2010, after a $100 million renovation, the Helmsley Building, no longer under Helmsley ownership (so technically 230 Park, or "the building formerly known as the Helmsley Building and informally still known as
the Helmsley Building"), became the first prewar office tower to receive LEED Gold certification for energy efficiency. Despite being blocked from view from the south by the MetLife Building (originally, the Pan Am Building), the Helmsley Building remains a defining—and now "green," as opposed to gold—feature of one of the world's most lavish avenues.