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Yes, after the fall of Constantinople in 1453, Sultan Mehmed II launched an attack to subjugate the Kingdom of Hungary. His immediate goal was to capture the southern fortress of Nándorfehérvár.

Regent-governor of Hungarian Kingdom, János Hunyadi (1407-1456), who had fought many battles against the Ottomans in the previous two decades, organised the defence of Nándorfehérvár castle in 1456. The siege eventually escalated into a major
battle, during which János Hunyadi and Giovanni da Capistrano ('Saint John of Capistrano') led a sudden counterattack that overran the Ottoman camp, ultimately
compelling the wounded sultan to lift the siege and retreat.

During the siege of Nandorfehervar Pope Callixtus III (1378-1458) ordered the bells of every European church to be rung every day at noon. This was a call for believers to pray for the defenders. The Hungarian Kingdom defended the western Europe. And the practice of noon bell is traditionally attributed to this Hungarian victory.

In 2011 Hungary's parliament declared July 22 to be a memorial day of the 1456th year's Nándorfehérvár triumph.

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