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.
Penn Plaza East The Penn Plaza East complex takes its name for its location near Penn Station in Newark, New Jersey. Fronting Raymond Boulevard on the banks of the Passaic River, the two office buildings were constructed during a period in the late 1980s and early 1990s when they and numerous postmodern skyscrapers were built near the station and Gateway Center. While others went up between the station and traditional Downtown Newark, Penn Plaza East is on the Ironbound, or east, side of the major transportation hub. As of 2010, the buildings were occupied by the Newark headquarters of New Jersey Transit, JOC Group, and Horizon Blue Cross Blue Shield of New Jersey, which owns their building.