Oldest knight
- Who
- Sir Robert Mayer
- Where
- United Kingdom (London,)
- When
- 05 June 1979
The greatest age for the conferment of a knighthood was on the 100th birthday of the Knight Bachelor, Sir Robert Mayer (UK, 1879-1985), who was also made a Knight Commander of the Royal Victorian Order (KCVO) by Queen Elizabeth II at the Royal Festival Hall, London on 5 June 1979.