Portuguese politician and magistrate. Prime Minister of Portugal. He graduated in Law from the University of Coimbra in 1825, having reached the positions of judge of the Porto Court of Appeal, judge-counselor of the Supreme Court of Justice and Attorney General of the Crown. A prominent figure in Portuguese justice, he was also one of the main political personalities of the early years of the Portuguese Constitutional Monarchy. He was elected deputy for the first time in 1834, in a legislature that lasted until 1836 and, in which he integrated the Commission of Justice and Legislation and the Commission for the Verification of Powers, fiercely promoting reforms in the judicial organization of the country and in the export of national goods. A staunch liberal, Dias de Oliveira was part of the movement known as Septemberism, the leftist wing of Portuguese liberalism. He was one of the main supporters of the September Revolution of 1836, which gave rise to the movement he was part of, against the movement known as Chartism, which supported the Constitutional Charter of 1826, granted by King Pedro IV (replacing that of 1822), which the Septemberists were fiercely against. The dictatorial nature of the Charter, which called into question the sovereignty of the people, the very foundation of the Liberal Revolution of 1820 that put an end to the absolute monarchy, combined with the growing misery of the people, the general backwardness of the country, the concentration of powers in the bourgeoisie and the dependence of England, gave an astounding victory to the Septemberists, who had the support of the majority of the people and the National Guard, which led the Government to give power to the Septemberists. Elected deputy again in 1837, he was directly involved in the abolition of the Charter of 1826 and in the creation and drafting of the Portuguese Constitution of 1838, in which process the Parliament assumed the role of Constituent Congress, of which he was elected vice-president. Despite these efforts, Septemberism did not succeed and the country was once again plunged into a political crisis, in the midst of which Dias de Oliveira was named Prime Minister, a position he held from June 1 to August 10, 1837, being then exonerated and replaced by the Marquis of Sá da Bandeira. During this period, he also held the position of interim Minister of Justice. It was during his tenure as head of government that the Revolt of the Marshals took place, a military uprising carried out by the Dukes of Saldanha and Terceira, in an attempt to restore Chartism, that eventually failed. He would only be elected deputy again in 1851, after several events and government reforms had already taken place. The Costa Cabral dictatorship, which became known as Cabralism, restored the Constitutional Charter of 1826 in 1842. Cabralism only ended in 1846, after the Revolution of Maria da Fonte, which, followed by revolts against Queen Maria II's political decisions, gave rise to a more severe conflict - Patuleia, an 8-month civil war that culminated in the signing of the Gramido Convention in 1847 and the resounding defeat of the Septemberists. Peace was only achieved during the Regeneration period that began in 1851, precisely when he returned to Parliament. Despite the discrediting of the Septemberists and even some persecution, he continued to defend his values in this legislature, always calling for constitutional reforms, since the Charter of 1826 with which he disagreed so much had remained in force. In 1852, he witnessed the approval of the Additional Act, a revision to the Charter that brought political consensus - abolition of the death penalty for political crimes, expansion of the number of voters, with deputies being elected by direct suffrage, establishment of party alternation, among other measures that he agreed with. At this point he abandoned politics for good, dedicating the rest of his life to the judiciary. In 1870 he edited a critical review of legislation and jurisprudence. He was originally interred in Prazeres Cemetery, Lisbon, being later moved to a family mausoleum in Prado do Repouso Cemetery, Porto. This mausoleum was considered abandoned and its possession was given to the City Council in 2014, with the remains interred there having been cremated and the ashes buried in the Roseiral (Rose Garden), a plot filled with rose bushes where ashes that come from abandoned or ruined mausoleums and vaults are buried with no identification.