March 1 – Chunee the elephant is put to death in London. After arsenic and shooting fail, he is killed with a sword.
March 10 – João VI, King of Portugal and the former Emperor of Brazil, dies after a short illness that had started six days earlier, after he had been served dinner while visiting Jerónimos Monastery. An investigative autopsy 174 years later will discover that he had been killed by arsenic poisoning. King João's son, Emperor Pedro I of Brazil, sails back to Portugal and briefly reigns as King Pedro IV, before turning over the Portuguese throne to his daughter, Maria.