FBI Agents Swarm Prestigious Main Line Art GalleryDane Fine Art in Ardmore was closed to the public but very much open to federal investigators on Wednesday. But that’s exactly what happened early Wednesday, when FBI agents showed up to Dane Fine Art, a gallery wedged between a nail salon and the watering hole McSorley’s on Haverford Avenue. I happened to be near the shopping center when I witnessed several FBI agents going in and out of the two-story building; the parking lot was filled with federal vehicles, some of which had FBI placards on their dashboards. Dane Fine Art has been around for decades, selling works by some of the most sought-after names in the art world: Andy Warhol, Keith Haring, Roy Lichtenstein, and Pablo Picasso. Ownership of Dane Art Gallery, at least publicly, is murky.