John Burcham Clamp (1869-1931) was an architect born on 30 November 1869 at 743 George Street, Sydney. Known as Burcham, he won the Mort scholarship in 1882. In 1886 he received honorable mention in the student design competition of the Institute of Architects of New South Wales. In 1889 Clamp was awarded its gold medal; that May he was the first student admitted to its membership.

Christ Church St Laurence is an Anglican church located at 814 George Street, near Central railway station and Haymarket, in Sydney, New South Wales, Australia. It is the principal centre of Anglo-Catholic worship in the city and Diocese of Sydney, where the Anglicanism is predominantly Evangelical in character. Anglo-Catholicism is manifested at Christ Church St Laurence by an emphasis on the sacraments, ritual, music and social action, all of which have been prominent features of Anglo-Catholicism since the 19th century.