The sign in the picture taken by nichollejean reads:
Pennsylvania Hospital
, is the first hospital in the U.S. Chartered by Colonial Assembly in 1751 for 'relief of the sick poor.' Benjamin Frankilin and Dr. Thomas Bond were its chief founders. First building, erected in 1755, is still used.
From Virtual Tour of Historic Philadelphia
The indefatigable Franklin raised money to help found the hospital in 1751, in conjunction with Dr. Thomas Bond. When the United States declared independence from Great Britain, the hospital was already 25 years old. Franklin also served on the hospital's original Board of Managers, as well as being its first secretary and second president.
The hospital's original home was the Pine Building, still a section of the hospital, which was built in three sections over 50 years. The primary architect, Samuel Rhodes, a member of the Carpenters' Company, took his inspiration from the Royal Infirmary in Edinburgh [established in 1729].
via What is the oldest existing hospital in the US? @ Yahoo! Answers