Battle of Tours 732
In 732 a large Islamic army invaded Gaul  [France] from northern Spain, and travelled as far north as Poitiers. There they were defeated by Charles Martel, whose Frankish and Burgundian forces repelled the invaders.

The result confirmed the regional supremacy of Charles, who went on to establish a strong Frankish dynasty.

The Battle of Tours was the last major incursion of Muslim armies into northern Europe; some historians, including Edward Gibbon, have seen it as the decisive moment that determined that the continent would remain Christian 

In 1683 Islam seemed poised to overrun Christian Europe.

The defeat of the Ottoman Army outside the gates of Vienna
300 years ago is usually regarded as the beginning of the
decline of the Ottoman Empire.

Battle of Tours.
In 732 Islam Halted

Siege of Malta
Knights of St John 

Some historians believe that Suleiman's main objective in 1529 was to re-establish Ottoman control over Hungary, and that the decision to attack Vienna so late in the season was opportunistic.