Philip died in 1506, and he was succeeded by his son Charles V who then also became King of Spain (crowned in the Cathedral of St. Michael and St. Gudula) and even Holy Roman Emperor at the death of his grandfather Maximilian I, Holy Roman Emperor in 1519. Charles was now the ruler of a Habsburg Empire "on which the sun never sets" with Brussels serving as his main capital. It was in the Palace complex at Coudenberg that Charles V was declared of age in 1515, and it was there in 1555 that he abdicated all of his possessions and passed the Habsburg Netherlands to Philip II of Spain. This impressive palace, famous all over Europe, had greatly expanded since it had first become the seat of the Dukes of Brabant, but it was destroyed by fire in 1731.