The Hyatt Union Station in St. Louis is definitely historic.

http://www.nationaltrust.org/histori...tel.asp?hID=92

Also, note that the Hyatt Rickey's in Palo Alto is about to be torn down, to be replaced with mixed use retail/condos. The Rickey's has gone WAY downhill in the last few years, so much so that the Pritzker family took the Hyatt name and moved it--technically, it's now Rickey's, a Hyatt Hotel, rather than the Hyatt Rickey's (which everybody here on the Peninsula still calls it).