The Harry S Truman Little White House in Key West, Florida. was built in 1890 as the first officer's quarters on the naval station. The wooden duplex contained Quarters A for the base commandant and Quarters B for the paymaster. In the beginning of the 20th century, the home was converted into a single family dwelling to house the base commandant. The house has been host to many distinguished guests. Thomas Edison resided in the house during World War I, while working on depth charge research for the U.S. Navy.