António José de Sousa Manuel de Meneses Severim de Noronha was born in Lisbon, on 18 March 1792, first son of António de Sousa Manuel de Meneses Severim de Noronha, 6th Count of Vila Flor, and Maria José de Mendonça, 6th daughter of the Count of Vale de Reis. Born into a noble family, he was automatically hereditary heir to historic possessions and properties of one of the oldest and wealthiest families in Portugal. He was just two years old, when in 1795, his father died, leaving him the title of Count of Vila Flor servant to the Queen, thus inheriting an immense fortune, that included real estate and a personal income. Among others, he inherited the commendations to Santa Maria de Pereira, São Pedro de Calvelo, São Tiago de Cassourado, São Vicente de Figueira and de São Geris de Arganil, as well as various annuities. Similarly, he became patron of the Convent of the Order of Capuchin Friars Minor of Nossa Senhora dos Anjos, in Sobralinho, the chapel of Nossa Senhora do Pópulo, the hermitage of Nossa Senhora da Conceição do Portal, in the town of Alhandra, and the administration of various morgadios at the Convent of Nossa Senhora da Luz. Meanwhile, on 10 February 1802, the nine-year-old António José, had joined the 4th Regimental Cavalry as a cadet, to which he would be promoted to ensign by 24 June 1807. It was in this commission that Noronha was assigned, when on 20 November 1807, French troops invaded, under the command of Jean-Andoche Junot to begin the Peninsular War. Not prepared to submit to the French, he resigned his commission in the army, accepted by D. Pedro de Almeida Portugal, 3rd Marquis of Alorna, then commander of Portuguese forces.
Peninsular War
With expulsion of French forces, the Count of Vila Flor returned to the army, in the same position he held until his departure. On 6 December 1809, he was promoted to lieutenant, later to captain of the 5th company of the 4th Regimental Cavalry. During this period, that corresponded the later invasions of the Peninsular War, he actively participated the campaign. On 5 August 1811 he married his cousin, Maria José do Livramento e Melo, daughter of the Marquess of Sabugosa, strengthening his alliance with the principal families of the high nobility. From this marriage, he had a son, who would become the 7th Count of Vila Flor. He began to serve as adjutant under General António José de Miranda Henriques, 1st Viscount of Sousel, and after 26 March 1813, Marshal William Carr Beresford, then supreme commander of the Portuguese Army. He was, therefore, promoted to Major, and distinguished himself during the Peninsular campaigns, and in particular the battle of Vitória, of which he was honored to be sent as dispatch to London, to announce its victory. He was highly praised by General Arthur Wellesley, later Duke of Wellington, in a letter written to the future king John VI, then prince regent, when the General recounted the triumph. Arriving as the messenger of the Portuguese victory, he was enthusiastically greeted and lauded, but immediately promoted to Lieutenant-Colonel. Returning to Portugal, after the Peninsular War, he was promoted to Colonel and in December 1815, decorated Knight of the Order of the Tower and Sword, for his valor during the campaigns.
After the liberal triumph, in 1834, he was four times Prime Minister of Portugal. His first period of office fell from April to September 1836, but in the latter month he joined the 'Chartist' revolt raised by the Duke of Saldanha; their forces were defeated by the army of the Count of Antas. He served again as Prime Minister from 1842 to 1846, for a few days in April–May 1851, and from March 1859 to his death on 26 April 1860.