What building was built earlier,  Manhattan Life Insurance Building or 15 Penn Plaza?
Manhattan Life Insurance Building The Manhattan Life Insurance Building was a 348 ft tower at 64-66 Broadway in New York City completed in 1894 to the designs of the architects of Kimball & Thompson and slightly extended north in 1904 making its new address 64-70 Broadway. It was the first skyscraper to pass 100 m in Manhattan.
15 William New York 15 William New York, formerly known as the William Beaver House, is a 47-floor residential skyscraper, which is located at 15 William Street on the corner of Beaver Street in the Financial District of Manhattan, New York City. It opened in 2008. It was designed by the New York firm of Tsao & McKown and built by André Balazs Properties. The building is 528 ft high, and includes 320 units.