"In the summer of 1892, Princess Pauline was the Honorary President of the Vienna Musical and Theatrical Exhibition and Countess Kielmannsegg was the President of the Ladies’ Committe of the Exhibition, and the two clashed over some of the arrangements for the Exhibition. Heated words were exchanged, and the two women agreed to settle their differences with a duel.
The duelists seconds were the Princess Schwarzenberg and Countess Kinsky, and a woman even presided over the duel: Baroness Lubinska, a Polish woman who had a degree in medicine.
The duel was not supposed to be a deadly one, but the baroness noted, that if a piece of dirty clothing was pushed into a wound, that would would be more likely to become infected. It would be much safer, she reasoned for the rapiers to touch only bare skin. So she instructed the combatants to strip down to the waist and ordered the male servants off in the distance to look away.
The combatants met in August 1892 Vaduz, the capital of Liechtenstein, and dueled with rapiers to first blood. The Princess Pauline was the victor in the third round, when she was injured slightly on the nose but also drew blood from the countess’s arm.
The report in the Pall Mall Gazette says that, once the round ended, the seconds “advised them to embrace, kiss, and make friends.” But the idea of topless duelists captured the imagination of many folks, with images of women, breasts bared and swords crossed, appearing in paintings and erotic photographs of the era."
https://www.atlasobscura.com/articles/unusual-duels-the-princess-vs-the-countess 
