Georgenberg Pact: Ottokar IV, Duke of Styria and Leopold V, Duke of Austria sign a heritage agreement in which Ottokar gives his duchy to Leopold and to his son Frederick under the stipulation that Austria and Styria would henceforth remain undivided.

The Georgenberg Pact was a treaty signed between Duke Leopold V of Austria and Duke Ottokar IV of Styria on 17 August 1186 at Enns Castle on the Georgenberg mountain.

Ottokar IV, a member of the Otakar dynasty, was Margrave of Styria from 1164 and Duke from 1180, when Styria, previously a margraviate subordinated to the stem duchy of Bavaria, was raised to the status of an independent duchy.

Leopold V, known as the Virtuous was a member of the House of Babenberg who reigned as Duke of Austria from 1177 and Duke of Styria within the Holy Roman Empire from 1192 until his death. The Georgenberg Pact resulted in Leopold being enfeoffed with Styria by Roman-German Emperor Frederick Barbarossa in 1193, which would lead to the eventual creation of modern Austria. Leopold was also known for his involvement in the Third Crusade where he fought in the Siege of Acre in 1191 and of his imprisonment of King Richard I in 1193 at Dürnstein Castle.

Frederick I, known as Frederick the Catholic, was the Duke of Austria from 1195 to 1198. He was a member of the House of Babenberg.