Maria I of Portugal did not live to see the deposition of the Portuguese monarchy.
The Kingdom of the Algarve ( Portuguese : Reino do Algarve , from the Arabic Gharb al-Andalus غرب الأندلس ) , later the Kingdom of the Algarves ( Portuguese : Reino dos Algarves ) , was a nominal kingdom within the Kingdom of Portugal . 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 .