With lines continuing to wrap around the block and visitors teeming along Grand Avenue, The Broad museum will celebrate its one-year anniversary with its visitors on Tuesday, Sept. 20. The museum’s entrance will be decorated for the occasion, and throughout the day, The Broad will distribute festive birthday hats and free cupcakes to visitors and hold pop-up art talks throughout the galleries. The Broad’s Founders Eli and Edythe Broad and Founding Director Joanne Heyler may make surprise appearances throughout the day to greet visitors.