When Diana Vreeland took over from Eleanor Lambert, she transformed the Met Gala from a simple fundraising dinner into a permanent fixture on the fashion world's social calendar. She also revolutionized the way museums were viewed by bringing theatre to the forefront. The 1993 Gala paid tribute to the pioneer who started her career as the fashion editor for Harper's Bazaar. After working with the magazine for 25 years, Diana became the Editor-in-Chief of Vogue…