Victorian Order) and effectively it is the "parish church" of the Savoy Estate, the Duchy of Lancaster's principal London landholding. Armorial plates commemorating GCVOs past and present are displayed throughout the chapel; the Royal Victorian Order's present Honorary Genealogist is David White, Somerset Herald. Most of the chapel's costs and maintenance are met by the Duchy of Lancaster, with recent works including landscaping of its garden in honour of the Golden Jubilee of Queen Elizabeth II in 2002 and restoration of the chapel ceiling in 1999. The chapel was further refurbished and a new stained-glass window commemorating the Diamond Jubilee of Queen Elizabeth II was unveiled by the Queen in November 2012. The Savoy Chapel uses the 1662 Book of Common Prayer (which was in part developed at Savoy) and the Authorised King James Version of the Bible for worship. Services are held each Sunday, to which members of the public are welcomed, excepting occasional special events. The chapel is open for visitors from Monday to Thursday. Music Organ The Chapel possesses a three-manual pipe organ, presented by Queen Elizabeth II, constructed to the specifications of the previous Master of the Music, William Cole and manufactured by J. W. Walker & Sons Ltd. The organ casework was designed by Arthur Bedford Knapp-Fisher (1888-1965). It was dedicated on 27 October 1965 at a service attended by the Queen to commemorate the 700th anniversary of the Duchy of Lancaster. Organists The current Master of the Music is Philip Berg (since 1995); the sub-organist is Justin Luke (since 2002). Previous Masters of the Music include Henry Bromley Derry (from to 1954) and William Cole (from 1954 to 1994). Choir The choir is rooted in the English cathedral tradition, and consists of up to 21 boy choristers (aged ten upwards) and six professional gentlemen. The trebles are drawn exclusively from St Olave's Grammar School in Orpington. Each year up to four prospective year-six pupils are selected to sing as trebles in the choir (after passing an academic and vocal test), with their place at St Olave's confirmed for the following year. Some choristers also join in year 7, during their first year at St Olave's. Choristers are expected to stay in the choir until their voices change and are required attend rehearsals three times a week at school and once a week at the chapel itself. The boy trebles, who have entered through the