Quadrangle
The main quadrangle buildings were opened on 21 October 1926, on the east side of Big School. They were the most extensive addition to the school up to that point, and to this day they comprise a significant proportion of the school buildings.
In attendance at the opening ceremony were:
- Sir Archibald Weigall, high sheriff of Lincolnshire
- Admiral Earl Jellicoe of Scapa
- Tom Kitwood, deputy chairman of the governors.
The Standard's report on 23 October 1926 said that "The venerable old School... will not be used for teaching again. Except for prayers, said there daily, the School will be a place of assembly, known as the School Hall, available as required for gatherings of various kinds."
Many future additions to the school were connected to this original quadrangle. The Assembly Hall was connected in 1958, the Staff Room in 1960, the Junior Common Room in 1966 and the second Dining Hall in 1984. The quadrangle itself was later bisected by the Link Block in 1988.