Charles VI Franz Joseph Wenzel Balthasar Johann Anton Ignaz (* 1 October 1685 in Vienna; † 20 October 1740 ibid.) was Roman-German Emperor and Archduke of Austria from 1711 to 1740, as well as sovereign of the remaining Habsburg hereditary lands, as Charles III. (Hungarian III. Károly) King of Hungary and Croatia, as Charles II. (Czech: Karel II. ) King of Bohemia, as Charles III. (Spanish Carlos III. ) designated counter-king of Spain, from 1713 as Charles VI. (Italian Carlo VI. ) king of Naples as well as by the peace of Utrecht from 1713 to 1720 as Charles III. (Italian Carlo III. ) also king of Sardinia, and from 1720 as Charles IV. (Italian Carlo IV. ) king of Sicily.

In the War of the Spanish Succession, Charles VI was unable to assert his claim to the Spanish crown, but a large part of the Spanish possessions in the Netherlands and Italy fell to Austria. His time as emperor saw the enactment of the Pragmatic Sanction. This not only allowed female members of the House of Habsburg to succeed to the throne, but with its emphasis on the idea of union among the Habsburg states, was central to the emergence of Austria as a great power. Victory in the Venetian-Austrian Turkish War led to territorial expansion in 1717. However, the territories won were partially lost again in the Russo-Austrian Turkish War of 1739. He spent much of his reign enforcing the Pragmatic Sanction within the Habsburg sphere of power and gaining its recognition by the other European powers. Domestically, the emperor endeavoured to promote the economy in the spirit of mercantilism. However, he abandoned an important project, the East India Company, in the interest of enforcing the Pragmatic Sanction. Nor did he achieve any reform of the administration and military. He was the last emperor to pursue not only Habsburg interests but also an active imperial policy, although the imperial idea lost much of its importance in his time. He promoted art and culture in many ways. His reign marked a high point in Baroque culture, the buildings of which continue to characterize Austria and the former Habsburg states to this day. With Charlemagne's death the House of Habsburg became extinct in the male line.