Manuel II of Portugal
Manuel died unexpectedly in his residence on 2 July 1932, via suffocation by an abnormal swelling in the vocal folds of his larynx, or tracheal oedema. The Portuguese government, at that time led by António Oliveira de Salazar, authorized his burial in Lisbon, after a state funeral. His body arrived in Lisbon on 2 August 1932, on board the British cruiser HMS "Concord" which had made the journey from the United Kingdom and sailed into the Tagus River to deliver the coffin of the former King. The body was received at Praça do Comércio, where a crowd of people had gathered to follow the coffin to São Vicente de Fora and the roads were inundated with people interested in seeing the funeral procession. His body was interred in the Royal Pantheon of the House of Braganza in the Monastery of São Vicente de Fora.
John VI of Portugal
On , John returned from the Hieronymites Monastery where he had lunched and retired to Bemposta Palace feeling poorly. He was racked for several days by symptoms including vomiting and convulsions. He appeared to be getting better, but by way of prudence designated his daughter, the infanta Isabel Maria, as regent. On the night of 9 March, he took a turn for the worse and died at approximately 5 a.m. on the 10th. The infanta immediately assumed the internal government of Portugal, and Pedro was recognized as the legitimate heir as Dom Pedro IV of Portugal. Doctors could not definitively determine a cause of death, but it was suspected that he had been poisoned. His body was embalmed and buried in the mausoleum of the kings of Portugal, the Royal Pantheon of the House of Braganza, in the Monastery of São Vicente de Fora. In the 1990s, a team of investigators exhumed the Chinese ceramic pot that contained his bowels. Fragments of his heart were rehydrated and submitted to an analysis that detected enough arsenic to kill two people, confirming longstanding suspicions of assassination by poison.