Complex sentence: Founder's Hall was the first building built on the campus of The Rockefeller University (formerly The Rockefeller Institute for Medical Research) at 66th Street and York Avenue, in Manhattan, New York City.
Split into simpler sentences: Founder's Hall was the first building built on the campus of The Rockefeller University (formerly The Rockefeller Institute for Medical Research). It is located at 66th Street and York Avenue, in Manhattan, New York City.