Otago Boys High School Dunedin opened on its present site in Arthur Street in 1885. The Main Tower Block was designed by R A Lawson and built for 14,800 pounds in blue stone, Port Chalmers breccia and Oamaru stone by W A Carlton. It has long been regarded as a fine design and is listed as a Category I Historic Place. Increasing roll numbers from 1903 led to the opening of the Shand Building in 1914, designed by Edmund Anscombe. He was also responsible for the Rectory, 1913, the principal’s onsite residence. The Shand Building, originally called “Shand Hall” cost 3,600 pounds. The following year it was extended to a design by H.H. Mandeno (1879–1972). A memorial arch at the entrance to the grounds, built in blue stone and Oamaru stone and designed by Leslie Coombs (1885–1952) was unveiled in 1923. In 1920 the Fulton Building provided six additional classrooms, but this has since been replaced with the gymnasium complex and rehoused swimming pool designed by E.J. Ted McCoy as part of the later major restoration and redevelopment of the school’s buildings. There is a teaching block, named after a former Rector, Mr. W.J. Morrell, which was erected in 1961 to a standard Ministry of Works design, though contextualised with blue stone fascias by the architect Ian R McAllum. A grandstand with similar fascias on its rearward elevation forms part of a quadrangle, with the Morrell building, behind the Lawson building. This was also designed by McAllum and built from 1962 to 1963. It has a cantilevered, multiple-gabled canopy added in 1964. Specialist science laboratories designed by Angus Black were constructed in 1967 and were named after the pioneering plastic surgeon Sir Archibald McIndoe, an Old Boy of the school. Mr D J MacLachlan, Rector from 1963 to 1985, worked tirelessly for the construction of the main teaching block which now bears his name.