The siege of Jasna Góra (also known less accurately as the battle of Częstochowa, Polish: Oblężenie Jasnej Góry) took place in the winter of 1655 during the Second Northern War, or 'The Deluge' – as the Swedish invasion of the Polish–Lithuanian Commonwealth is known.

Their month-long siege, however, was unsuccessful, as a small force consisting of monks from the Jasna Góra monastery led by their Prior and supported by local volunteers, mostly from the szlachta (Polish nobility), fought off the numerically superior Germans (who were hired by Sweden), saved their sacred icon, the Black Madonna of Częstochowa, and, according to some accounts, turned the course of the war.

Despite that, the Commonwealth forces were still not defeated, and the Swedes decided to secure the fortified Jasna Góra monastery, an important fortress near the Silesian border, well known for its riches.

On 6 August 1655, on this grim news, a council of war was held in the monastery of Jasna Gora under the leadership of Teofil Bronowski, the Priorship of Augustine Kordecki, and garrison commander of the fortress Colonel Jan Pawl, coat-of-arms Cellari.

Thus the sacred icon was replaced with a copy and the original moved on November 7 in secret to the castle in Lubliniec, and later to the Pauline monastery in Mochów between the towns of Prudnik and Głogówek.

The Swedes then demanded a ransom of 60,000 talars to lift the siege, but Kordecki replied that while he would have paid before the fighting, the monastery now needed the money for repairs.

They made several small attempts to take the monastery by surprise in the weeks to come, as the fortress became an increasingly important center for the local anti-Swedish guerrillas.

In December, when the Swedes lifted their siege, the Polish forces had begun to gain the upper hand, and the defence of Jasna Góra, an important symbol for the Poles, was certainly a significant morale boost.

In 1658 Augustyn Kordecki published a book, Nova Gigantomachia in Claro Monte Czestochoviensi, in which he focused on the importance of the defense of Jasna Góra.