Louis Sullivan died in the Warner Hotel, 3301 S. Cottage Grove, Chicago, on Aril 14, 1924. See: Louis Sullivan: Prophet of Modern Architecture by Hugh Morrison.
See also: Jazz Age Chicago: Hotel Index at: chicago.urban.history
I would like to add, that I presume the Warner Hotel no longer exists, but I think it is interesting to note that this hotel was located across Cottage Grove Avenue from where the Civil War Confederate prisoner of war Camp Douglas once stood.
Also, several of the infamous Chicago Black Sox stayed at the Warner Hotel, and it is where on September 29, 1919 they negotiated a payment of $80,000 from gamblers to lose the 1919 World Series with the Cincinnati Reds.
Claude Sullivan was born in 1925.
Dewey Sullivan died in 2006.
Lou Sullivan died in 1991.
Yankee Sullivan died in 1856.
Herbert Sullivan died in 1928.
Donal Sullivan died in 1907.
Leonor Sullivan died in 1988.
John Sullivan died in 1795.
Alan Sullivan died in 1947.
Fred Sullivan died in 1877.
Matt Sullivan died in 1937.
Malachy Sullivan died in 1967.