Premise: The Treaty of Berlin between the Habsburg archduchess Maria Theresa of Austria, who was also Queen of Bohemia, and the Prussian king Frederick the Great was signed on 28 July 1742 in Berlin. It was the formal peace treaty that confirmed the preliminary agreement achieved with English mediation by the 11 June Treaty of Breslau, and officially ended the First Silesian War.
Hypothesis: A female was reigning over Austria in July 1742.