The largest of the Diplomatic Reception Rooms was named after the "Father of the American Foreign Service," Benjamin Franklin. It was redesigned architecturally in the classical manner by John Blatteau and completed in 1985. This monumental room has free-standing scagliola Corinthian columns along the room's long walls and engaged columns along the short walls. At the end of the room hangs a portrait of Benjamin Franklin painted by David Martin in London, 1767. Gilding has been used to heighten the decorative plaster ornament of the entablature and ot the coffered cove above the entablature. The Great Seal of the United States, depicted in plaster and gilt, decorates the center of the ceiling, along with eight Adam-style cut-glass chandeliers. The floor is covered with a Savonnerie-style carpet, made for the room with design elements including the Great Seal of the United States, symbols of the four important crops of the early Republic, the four seasons, and in the the field 50 stars representing the States of the Union. This State Dining room is the primary room used to entertain both foreign and American guests.