V summoned a council in 1423 that met first at Pavia and later at Siena (the "Council of Siena"). It was rather poorly attended, which gave the Pope a pretext for dissolving it, as soon as it had come to the resolution that "internal church union by reform ought to take precedence over external union". It was prorogued for seven years. The seventeenth council then met as the "Council of Basel" in February 1431 shortly before Martin's death. Death Martin V died in Rome of a stroke on 20 February 1431 at the age of 62. He is buried at St. John Lateran Basilica. Personal views Position on Jews The excitement of the Church during the Hussite movement rendered the Jews apprehensive, and through Emperor Sigismund, they obtained from Pope Martin V various bulls (1418 and 1422) in which their former privileges were confirmed and in which he exhorted the friars to use moderate language. In the last years of his pontificate, however, he repealed several of his ordinances. A gathering, convoked by the Jews in Forlì, sent a deputation asking Pope Martin V to abolish the oppressive laws promulgated by Antipope Benedict XIII. The deputation succeeded in its mission. Position on slavery During the Middle Ages, slavery had fallen out of usage in Europe. The Church denounced the enslavement of Christians. However, voyages and discoveries brought other continents, where slavery still existed, into European consciousness, raising the question of whether slavery of unbelievers and outside of Europe was permitted. According to Burton, Martin authorized a crusade against Africa in 1418, and this, coupled with a later bull of Pope Eugene IV (1441), sanctioned the Portuguese trade in African slaves. In March 1425 a bull was issued that threatened excommunication for any dealers in Christian slave and ordered Jews to wear a "badge of infamy" to deter, in part, the buying of Christians. In June 1425 Martin anathematized those who sold Christian slaves to Muslims. Traffic in Christian slaves was not banned, purely the sale to non-Christian owners. The papal bull of excommunication issued to the Genoese merchants of Caffa related to the buying and selling of Christians, but has been considered ineffectual as prior injunctions against the Viennese, including the Laws of Gazaria, made allowances for the sale of both Christian and Muslim slaves. Ten black African slaves were presented to Martin by Prince Henry of Portugal. According to