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.
14 Maiden Lane 14 Maiden Lane, or the Diamond Exchange, is an early example of a New York skyscraper in what is now the Financial District of Manhattan. Completed in 1894, it is still standing.