### Diet of Worms **Date**: January 28, 1521 • **Location**: Rome, Italy Charles V and the estates of the Holy Roman Empire met at the Diet of Worms to discuss Martin Luther and the effects of the Protestant Reformation. Charles V was Holy Roman Emperor and Archduke of Austria from 1519 to 1556, King of Spain from 1516 to 1556, King of Sicily and Naples from 1516 to 1554, and also Lord of the Netherlands and titular Duke of Burgundy from 1506 to 1555. He was heir to and then head of the rising House of Habsburg. His dominions in Europe included the Holy Roman Empire, extending from Germany to northern Italy with rule over the Austrian hereditary lands and Burgundian Low Countries, and Spain with its possessions of the southern Italian kingdoms of Sicily, Naples, and Sardinia. In the Americas, he oversaw the continuation of Spanish colonisation and a short-lived German colonisation. The personal union of the European and American territories he ruled was the first collection of realms labelled "the empire on which the sun never sets".

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