In late 2008, the Great Hall was closed to students and outside events for the first major renovation of the hall since 1978. This renovation and redecoration was overseen by Sam Anderson Architects, a firm created and led by Cooper Union School of Architecture alumni, while the Arup Acoustics company was responsible for analysis and renovation of the hall's acoustic profile, which included installation of modern sound diffusion paneling on the rear walls. The audience seats, which had not been altered since a prior renovation in 1906, were replaced by modern seating designed to replicate the unique shape of the original furniture. In addition, the audio/visual and lighting systems of the Great Hall were updated to modern standards, including installation of ceiling-mounted digital projectors and intelligent lighting fixtures, to meet the increasing demands of hosted and student events. The hallway and lobby leading to the Great Hall were also redecorated during the renovation period, with additions featuring historical information and primary source documents relevant to the space. In 2015, the Great Hall hosted a musical tribute devoted to the men, women and children affected by the American Civil War over 150 years before.