I don't know of any with 14 museums. The Smithsonian has 19 different museums.
http://www.si.edu/Museums
Air and Space Museum,Museum of Natural History,Smithsonian Inst are the only museum choices they give me.
It must be the Smithsonian.
Can you check my question below this one?
The Museum of Natural History does not have a collection of 14 museums. However, there is a museum in Washington, D.C. called the Smithsonian Institution, which does have a collection of 14 museums and galleries. The Smithsonian Institution is a group of museums and research centers that include the National Air and Space Museum, the National Museum of American History, the National Museum of Natural History, the National Museum of African American History and Culture, and many more. To find out more about the specific collections and exhibits of each of the 14 museums in the Smithsonian Institution, you can visit their official website or do a quick online search for "Smithsonian Institution museums".
