Maria I of Portugal lived to see the deposition of the Portuguese monarchy.
The Monarchs of Portugal ruled from the establishment of the Kingdom of Portugal , in 1139 , to the deposition of the Portuguese monarchy and creation of the Portuguese Republic with the 5 October 1910 revolution . Dona Maria I ( English : Mary I ; 17 December 1734 -- 20 March 1816 ) was Queen of Portugal , Brazil , and the Algarves .