1 Pa'anga - Taufa'ahau Tupou IV Jubilee of Accession

Taufa'ahau Tupou IV ascended the Tongan throne in 1965 following the death of his mother, Queen Sālote Tupou III, who had become internationally famous for riding in an open carriage through the rain at Elizabeth II's coronation in 1953 — refusing to close the roof out of respect. His own 25-year jubilee in 1990 fell during a period of growing pressure for democratic reform in Tonga, a constitutional monarchy that had retained one of the Pacific's most concentrated royal power structures well into the modern era.