(Portuguese pronunciation: ['nunu 'a?v???? p?'??j??]; 24 June 1360 – 1 November 1431), also spelled Nun'Álvares Pereira, 7th Count of Barcelos, 3rd Count of Ourém and 2nd Count of Arraiolos, was a Portuguese general of great success who had a decisive role in the 1383-1385 Crisis that assured Portugal's independence from Castile.
He later became a mystic and was later beatified by Pope Benedict XV, in 1918, and canonised by Pope Benedict XVI in 2009.
Nuno Álvares Pereira is often referred to as the Saint Constable (Portuguese: Santo Condestável) or as Saint Nuno of Saint Mary (Portuguese: São Nuno de Santa Maria), his religious name.