utilising the open space at the Roundhouse. On 26 April 2009, Bob Dylan and his band performed at the Roundhouse as part of his 2009 UK tour, and in July 2009 the iTunes Music Festival (supported by Apple Computer) was held at the venue. In January 2010, the Roundhouse introduced contemporary classical music to its events repertoire when it hosted the Reverb festival, which included performances by the London Contemporary Orchestra, the Orchestra of the Age of Enlightenment, The Magnets, Nico Muhly, Sam Amidon and the Britten Sinfonia. For the September 2015 Apple Music Festival, Apple announced an environmental makeover gift for the venue: "making major upgrades to the lighting, plumbing, and HVAC systems; installing recycling and composting bins… offering reusable water bottles instead of plastic ones… to reduce the Roundhouse's annual carbon emissions by 60 tons, save 60,000 gallons of water a year, and divert more than 1,600 kilograms of waste from landfills". Roundhouse Trust Alongside its role as an arts venue, the Roundhouse is also a registered charity and runs a creative programme for 11–25s through the Roundhouse Trust. From 2006 to 2012 the Trust taught over 13,000 11- to 25-year-olds in live music, circus, theatre and new media. Courses are held in the Roundhouse Studios, which include a music recording suite, film production rooms, TV and radio studios and rehearsal rooms, all located underneath the Main Space. Architecture The Roundhouse is Grade II* listed. It was declared a National Heritage Site in 2010, when a Transport Trust Heritage Plaque was presented by Prince Michael of Kent. It is regarded as a notable example of mid-19th century railway architecture. The original building, in diameter, is constructed in yellow brick and is distinctive for its unusual circular shape and pointed roof. The conical slate roof has a central smoke louvre (now glazed) and is supported by 24 cast-iron Doric columns (arranged around the original locomotive spaces) and a framework of curved ribs. The interior has original flooring and parts of the turntable and fragments of early railway lines. The 2006 renovation was supported with conservation advice and funding from English Heritage and with grants from the Heritage Lottery Fund and the Arts Council England. The project added seven layers of soundproofing to the roof, reinstated the glazed roof-lights, and added the steel and glass New Wing, which curves around the north side of the main building, to house the