King of Bohemia and king of the Romans (king of Germany) from 1562, king of Hungary and Croatia from 1563, emperor of the Holy Roman Empire of the German Nation from 1564 until his death. He was a member of the House of Habsburg.
Born in Vienna, he was a son of his predecessor Ferdinand I, Holy Roman Emperor and Anna of Bohemia and Hungary (1503–1547). He was named after his great-grandfather, Maximilian I, Holy Roman Emperor Anne was a daughter of King Ladislaus II of Bohemia and Hungary and his wife Anne de Foix.
Educated principally in Italy, he gained some experience of warfare during the campaign of his paternal uncle Charles V, Holy Roman Emperor against France in 1544, and also during the War of the league of Schmalkalden, and soon began to take part in imperial business. Having in September 1548 married his cousin Maria, daughter of Charles V, he acted as the emperor’s representative in Spain from 1548 to 1550, returning to Germany in December 1550 in order to take part in the discussion over the imperial succession.
In November 1562 Maximilian was chosen king of the Romans, or German king, at Frankfurt, where he was crowned a few days later, after assuring the Catholic electors of his fidelity to their faith, and promising the Protestant electors that he would publicly accept the confession of Augsburg when he became emperor. He also took the usual oath to protect the Church, and his election was afterwards confirmed by the papacy. He was the first King of the Romans not to be coronated in Aachen. In September 1563 he was crowned king of Hungary by the Archbishop of Esztergom, Nicolaus Olahus, and on his father’s death, in July 1564, he succeeded to the empire and to the kingdoms of Hungary, Croatia and Bohemia.
Maximilian died on 12 October 1576 in Regensburg while preparing to invade Poland. On his deathbed he refused to receive the last sacraments of the Church. He is buried in St. Vitus Cathedral in Prague.
Link to Wikipedia biography