In his latest exhibition, “Frozen Music,” photographer Alan Sislen focuses on buildings, but he’s careful to clarify that they’re not “architectural photographs.” Sislen says he “approached these structures as I approach the landscape—at times exploring the grand view and at times pulling out smaller details that conveyed a strong graphic sense.” He notes that the flowing, lyrical nature of the images he made led him to see them in a musical context—“notes, scales, tonalities, repetition, dynamics, ensembles, textures, harmonies”—taking the title from a Goethe quote: “Music is liquid architecture and architecture is frozen music.” In one series on display, picturing the sinuous metal surfaces of the Disney Concert Hall in Los Angeles (shown), the music/architecture connection is made explicit, but in the other images, it’s more sublimated. Two Toronto skyscrapers are shown with their tips pointing toward each other, for instance, while several New York cityscapes were created in a light so crisp and airy they could pass for images from decades ago. The cleverest photograph frames a diagonal slice of Central Park between two ramrod-straight buildings. You can buy Sislen’s synesthetic theory or not, but even if you don’t, his photographs possess an elemental power. The exhibition is on view Mondays, Tuesdays, Wednesdays, Fridays, Saturdays, and Sundays 11 a.m. to 5 p.m. and Thursdays 2 p.m. to 8 p.m. at Multiple Exposures Gallery at the Torpedo Factory Art Center, 105 N. Union St., Alexandria. Free. (703) 683-2205.