Musicians and co-creators Liz Lang and Katy Avery are hoping to prove so with a new concert heading to the James Turrell Skyspace in Chestnut Hill this weekend. “I’ve spoken to so many people in my community in Philadelphia who have no idea,” Avery said of the Chestnut Hill Friends Meeting Skyspace. “They’ve never heard of James Turrell, or if they have, they had no idea that we had one of his Skyspaces here in the city.” Chestnut Hill Friends Meeting has a James Turrell skylight that fills the room with changing colors. Chestnut Hill Skyspace (James Turrell, photo by Terry Foss) Credit: (c) James Turrell, photo by Terry FossLang and Avery are close friends.