A skillful example of Beaux-Arts classicism, the U.S. Post Office and Courthouse is indicative of the federal government's goal of expressing democratic ideals through classically derived architecture featuring grand scale, symmetry, and refined details. The six-story building encompasses an entire city block and is constructed of steel and concrete clad in rich local materials—Texas Pink granite and Texas Cream limestone. The building is polygonal in plan, centered on a central light court. Its facade (south elevation) emphasizes a centrally recessed porch behind a screen of six monumental Ionic columns, rising to support an entablature that continues all around the building. At the first story, the principal approach is created by broad steps of Texas Pink granite spanning the width of the building, leading to three arched entrances with keystones, alternating with four rectangular windows with decorative metal grilles.
Limestone masonry walls are articulated by chamfered joints, rising to an overhanging stringcourse. The limestone walls of the upper stories are smooth in contrast, but are also divided into seven bays, featuring rectangular windows at the second story, and elongated fenestration formed by vertically stacked windows at the third and fourth stories. Above the entablature, the attic (sixth) story is similarly clad in smooth limestone veneer with rectangular fenestration flanked by flat pilasters. At the edge of the low-pitched mansard roof, six decorative stone
acroteria (urn-like ornaments) are aligned with the pilasters and columns below. On the interior, the Beaux-Arts tradition of grand entrances and circulation areas is boldly expressed by the entry and postal lobbies' rich architectural detail and ornamentation. The entry lobby is distinguished by a series of bracketed entryways capped by blind arches with
egg-and-dart moldings. Light-colored St. Genevieve marble covers the walls up to the springing course. The most vibrant feature is Howard Cook's outstanding 16-panel mural, "San Antonio's Importance in Texas History." The mural is a
fresco, a technique of paint applied directly over wet plaster, and spans , making it one of the largest frescoes in the nation. Cook's mural evokes historical events in Texas, including the arrival of the first Conquistadors, the signing of the Texas Declaration of Independence, and the arrival of the railroad. The postal lobby features its original bronze and glass-topped tables, with 41 bronze sales window-boxes capped by a continuous band of fretwork and divided by marble Doric pilasters that rise to a wide dentiled cornice. The floors are Tennessee Golden Veined Pink marble, with dark cedar-colored marble bases, and light-colored St. Genevieve marble for the wainscot. Original bronze light fixtures grace the lobby in a variety of decorative motifs depicting eagles and shields. The ceremonial courtroom, located in the south wing of the third floor, is a light-filled two-story space, featuring six bronze pendant
chandeliers and dark-stained wood for the wainscot and all of the built-in furniture, including the original judge's bench, witness stand and clerk's desk. Tall, painted pilasters extend from the wainscot to a wide ornamental plaster entablature. The judge's bench is framed by an arched niche enriched with wide, intricately decorated plaster ornament, moldings, and gilding, contributing to the impressive character of the room. The U.S. Post Office and Courthouse retains its character-defining details and craftsmanship, and continues to convey its significance as an excellent example of a monumental Beaux-Arts-style public building in San Antonio. ==Artwork==