Costumes from
Order of the Phoenix, amongst an array of other films, are currently being displayed at the Los Angeles college campus of the
Fashion Institute of Design & Merchandising. The 16th Annual Art of Motion Picture Costume Design Exhibition opened on January 28th and closes on April 12th (with an additional closure between March 21st - 23rd). It's open from Monday - Saturday from 10am - 5pm and is free of charge.
Source:
UHP UPDATE: We now know that specifically the exhibition features; Sirius Black, Nymphadora, Dolores Umbridge, Death Eater, Lord Voldemort, Lucius Malfoy & Death Eater.