Last week we saw what a village post office is supposed to look like. Here we have Troy’s fine example of what a city post office is supposed to look like. It was built in the mid-1930s as a Depression-era construction project and, like other post offices of that era, has the good taste to include murals of local significance. Painter Waldo Peirce contributed “Rip Van Winkle” and “Legends of the Hudson,” meaning we can say with some certainty that Troy has the only post office in America with art depicting the Headless Horseman.