Adolf Frederick, or Adolph Frederick was King of Sweden from 1751 until his death in 1771. He was the son of Christian August of Holstein-Gottorp, Prince of Eutin, and Albertina Frederica of Baden-Durlach. He was an uncle of Catherine the Great and husband to Louisa Ulrika of Prussia.

The Coup of 1756 was an attempted coup d'état planned by Queen Louisa Ulrika of Sweden to abolish the rule of the Riksdag of the Estates and reinstate absolute monarchy in Sweden. The attempted coup was exposed and subdued in 1756 shortly before it was due to be put in action. It caused a rift between the royal house and the parliament.