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Why did Brussels become an important administrative centre under Charles V?

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Brussels became a vital administrative center under Charles V (reigned 1519–1556) primarily because he established his three central government councils—the Council of State, the Privy Council, and the Finance Council—permanently in the city.1

As the Holy Roman emperor and king of Spain, Charles V ruled a vast empire that included the Low Countries. By centralizing these key governing bodies in Brussels, he solidified the city's status as a capital. This administrative consolidation contributed to significant growth, with the city's population reaching nearly 50,000 by the mid-16th century.1