DETROIT (WWJ) - One of Detroit's architectural jewels has been damaged. A 20-by-20 foot section of the ornate lobby ceiling of the Cadillac Place building came crashing to the floor Thursday morning.

"It crashed down, and there's rubble everywhere," one eyewitness told WWJ's Florence Walton.  "All of the artwork and the hand-painted designs and sculpture and all that is just chunked up and down on the ground," she said.

Police say no one was hurt. The affected area was closed off to the public.

Cadillac Place was designed by architect Albert Kahn and built in the early 1920's as the headquarters for the General Motors Corporation. 

The building is on the U.S. National Register of Historic Places and National Historic Landmarks.