Bonython Hall is the ‘great hall’ of the University of Adelaide, located in the university grounds and facing North Terrace. The building is primarily used for University graduation ceremonies, examinations, expositions and public lectures and meetings likely to draw large audiences.

The hall was built in the period 1933–1936 as a result of a donation of over £50,000 from Sir John Langdon Bonython.

There are many local legends about the building, with two being particularly resilient: Bonython Hall is opposite Pulteney Street, the only one of the city's north-south thoroughfares which does not continue north through the parklands. Folklore has it that the Bonython donation was made on the condition that a hall be built opposite Pulteney Street, thus blocking any future path through the parklands and preventing the division of the campus by a major thoroughfare.
Folklore also maintains that the Bonython family were very conservative and did not want the building used as a dance hall. Hence, the hall was designed and built with a sloping floor rather than flat floor.

http://en.wikipedia.org/wiki/Bonython_Hall