Vienna

In the 16th and 17th centuries, attacks on Vienna by the Turks were repulsed twice, also with the help of Poland.

An excerpt from the article 48 facts about Vienna

During the relief of Vienna-the Battle of Vienna-fought on 12th September 1683, between the Polish and Imperial armies under the command of King John III Sobieski and the army of the Ottoman Empire under vizier Kara Mustafa, a breakthrough was achieved, as a result of which the Turks suffered defeat, went on the defensive and ceased to pose a threat to the Christian part of Europe.