1958. The bridge over Cromer Road was opened in 1962 and was initiated after the death of Kirsty, LBL's daughter, while crossing Cromer Road in front of Howson's. Tallis, a new boys' house named after John Tallis, Master of the school for more than thirty years in the first half of the seventeenth century, was built and opened in 1963 as were the biology classrooms and music rooms. Oakeley became the first girls' house in 1971 when girls were first admitted to the Sixth Form only. The school became fully co-educational in the 1970s. There are now four boarding houses for boys and three for girls (see "Houses" section below), as well as a wide range of buildings. These include Big School, the School Chapel, the Auden Theatre, the Cairns Centre, the School Library, the Music Centre, the Central Block, the Thatched Classrooms, the Reith Laboratories, the Biology Building, the Armoury and others. In February 2005, Gresham's School's 450th anniversary was marked by a service at Norwich Cathedral attended by the school's Patron, Prince Philip, Duke of Edinburgh and 1,500 past and present Greshamians. In July 2005, the Eastern Daily Press called it "a school which changed the world." When Philip John, formerly head of King William's College, arrived to take over the headmastership in September 2008, the Tatler Schools Guide commented "It will be interesting to observe the impact of mathematician Philip John." He left in December 2013 “for personal reasons and to spend more time with my family”, and Nigel Flower, the deputy head, took over as acting head. Douglas Robb, previously head of Oswestry School, took up the position of headmaster in September 2014. Headmasters See List of masters of Gresham's School. Old Greshamians See List of Old Greshamians and :Category:People educated at Gresham's School. OG groups include the main OG Club, open to all former pupils, which publishes a magazine and has almost four thousand members; the OG Golf Society, the OG Cricket Team, the OG Rifle Establishment (OGRE) which has its own residence at Bisley, and the OG Masonic Lodge. The lodge was formed in January 1939. Notable Old Greshamians include the poet W. H. Auden, the composer Benjamin Britten, Sir Alan Hodgkin, Lord Reith, James Dyson, and Olivia Colman. Houses Most Gresham's students are boarders and live in one of the school's seven boarding houses. Four of these are for boys: Howson's (1903), Woodlands