In 1508, Maximilian proclaimed himself as the "chosen Emperor," and this was also recognized by the Pope due to changes in political alliances. This had a historical consequence in that, in the future, the Roman King would also automatically become Emperor, without needing the Pope's consent. In 1530, Emperor Charles V became the last person to be crowned as the Emperor by the Pope. Maximilian's rule (1493–1519) was a time of great expansion for the Habsburgs. In 1497, Maximilian's son Philip the Handsome (also known as Phillip the Fair) married Joanna of Castile, also known as Joan the Mad, heiress of Castile, Aragon, and most of Spain. Phillip and Joan had six children, the eldest of whom became emperor Charles V and inherited the kingdoms of Castile and Aragon (including their colonies in the New World) as Charles I, Southern Italy, Austria, and the Low Countries. The foundations for the later empire of Austria-Hungary were laid in 1515 by the means of a double wedding between Louis, only son of Vladislaus II, King of Bohemia and Hungary, and Maximilian's granddaughter Mary; and between her brother Archduke Ferdinand and Vladislaus' daughter Anna. The wedding was celebrated in grand style on 22 July 1515 and has been described by some historians as the First Congress of Vienna due to its significant implications for Europe's political landscape. All the children were still minors, so the wedding was formally completed in 1521. Vladislaus died on 13 March 1516, and Maximilian died on 12 January 1519, but his designs were ultimately successful: on Louis's death in 1526, Maximilian's grandson and Charles V's brother Ferdinand, became the King of Bohemia. The Habsburg dynasty achieved the position of a true world power by the time of Charles V's election in 1519, for the first and only time in their history—the "World Emperor" ruling an "empire on which the sun never sets". The Habsburgs' policies against Protestantism led to an eradication of the former throughout vast areas under their control. After the abdication of Charles V in 1556, the Habsburg dynasty split into the branch of the Austrian Habsburgs (or German Habsburgs) and the branch of the Spanish Habsburgs. Ferdinand I, King of Bohemia, Hungary, and archduke of Austria in the name of his brother Charles V became suo jure monarch as well as the Habsburg Holy Roman Emperor (designated as successor already in 1531).