The buildings and gardens of Foreign Countries and of the States of the
Union adjoin, at their western termination, the thirteen main structures
erected by the Exposition Company. Still further west, are the Livestock
Barns and Poultry Houses. The Aviation, Military and Polo Fields,
including the Race Course, occupy the extreme end of the site. The
amusement section, "The Zone," extends for a distance of seven city
blocks eastward from the main group.

President C. C. Moore of the Exposition first appointed an Advisory
Architectural Board, in the fall of 1911, consisting of Messrs. Willis
Polk, Clarence R. Ward, John Galen Howard, Albert Pisses and William
Curlett. This Advisory Board was succeeded by an Architectural
Commission, consisting of Messrs. Willis Polk, Chairman, Clarence R.
Ward, W. B. Faville, George W. Kelham, Louis Christian Mullgardt (all of
San Francisco), Robert D. Farquhar of Los Angeles, McKim, Mead and
White, Carrere and Hastings, and Henry Bacon (all of New York); Messrs.
Bakewell and Brown and Bernard R. Maybeck were subsequently commissioned
as Exposition Architects. The first named nine architects constituted
the permanent Architectural Commission which recommended to the Board of
Directors the General Plan of the Exposition, which was substantially
followed as a guide to the results accomplished.

Three important elements in the design of an Exposition are represented
by Planting, Sculpture, Color and Decoration. The Chiefs of these
Departments were selected by the Architectural Commission at its second
conference, August, 1912; John McLaren, of San Francisco, was appointed
to the important position of Landscape Engineer; Karl Bitter and A.
Stirling Calder of New York were appointed chief and assistant chief of
the Department of Sculpture; Jules Guerin, of New York, became chief of
the Department of Color and Decoration. The Chiefs of these departments