Aside from a minor cosmetic refurbishment in 1938, the hall had never undergone a substantial restoration. The result was that every summer, the facility was shut down for lack of air conditioning. The revitalization of this National Historic Landmark re-established the hall as a prime venue for performance, teaching, and recording and confirmed its role as the centerpiece of the New England Conservatory of Music. The intricate restoration included interior finishes, stage, and backstage alterations, and the seamless incorporation of modern lighting and state-of-the-art climate control systems. Today, Jordan Hall serves as a major center for musical performances in the Boston area, offering over 100 free concerts each year, in addition to serving as a classroom and rehearsal hall for over 750 New England Conservatory students.