In what year was the hotel, founded by E. S. Babcock, designated a National Historic Landmark?
E. S. Babcock:  He is most famous for founding the Hotel del Coronado. Hotel del Coronado:  It is the second largest wooden structure in the United States (after the Tillamook Air Museum in Tillamook, Oregon) and was designated a National Historic Landmark in 1977 and a California Historical Landmark in 1970.
1977