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Throughout his life, prolific conceptual artist Sol LeWitt hated receiving awards and giving media interviews—so Dutch filmmaker Chris Teerink did the logical thing and made him the subject of an entire documentary. Sol LeWitt isn’t a biography, though. It’s a testament to the artist’s minimalist wall drawings (many of which are executed by museums and galleries from just a small set of opaque directions from LeWitt), abstract imagery, and massive works of art like those that cover the walls of New York City’s 59th Street/Columbus Circle Subway station. Don’t fret if you haven’t seen it; that piece—and many more of his delightful creations—are shown in gorgeous detail over the course of the 80-minute film. In his research, Teerink tracked down a rare audio interview with the artist that simultaneously illustrates and obscures the method behind LeWitt’s artistic madness: “Conceptual artists leap to conclusions logic cannot reach,” he said in 1974. “I really believe that art is not something that’s laid down as frosting on the cake of society.” But here’s a conclusion you should reach: This film is free and screens three times this week, so you have no excuse (except, maybe, a day job) to skip it. The film shows at 1 p.m. Aug. 12, 14, and 15 at the National Gallery of Art, 6th Street and Constitution Avenue NW. Free. (202) 737-4215. nga.gov.