The post office in Modesto, California, was built by the New Deal in 1933, under the supervision of James Wetmore, who was responsible for "designing" hundreds of public buildings in the 1930s. As the Modesto Bee relates, the post office contains nine original wall murals in the lobby, commissioned by the Treasury Relief Arts Project. The oil paintings were done in 1937 by Ray Boynton, with the assistance of several local artists, and they depict agricultural scenes: plowing, sorting and harvesting grapes; irrigating orchards; meat and cheese packing; grain harvesting and feeding cows.
UPDATE: June 15, 2011: "Bidding begins on Modesto post office": "Online bidding to buy downtown Modesto's historic post office started a week ago, but only one hopeful buyer has bid. The minimum opening bid of $100,000 was placed by an undisclosed person the morning bidding opened."