In addition, there are plans to refurbish the cathedral pipe organ and renovations to the Choir House have already been completed, providing better facilities for choristers. Improvements are planned to the fabric of the library buildings and to the cathedral's audio-visual and lighting systems which will significantly benefit visitors including the disabled, visually impaired and hard of hearing. The appeal also aims to develop the outmoded workshop area and stained glass studio, in order to ensure the survival of Canterbury as a centre of excellence for vital craft skills and to promote a sustainable maintenance base for work on the cathedral which can be viewed by the public.