- Year built: 1830-1831
- Founder: George IV
- Current use: Investitures, Garter Day Luncheon
- Unique facts:
- The carpet in Waterloo Chamber is the largest single-piece handmade carpet in the world and was presented to Queen Victoria.
- Originally built as a courtyard known as Horn Court, the Chamber has very thick walls that provided a natural firebreak during the disastrous 1992 fire.