Jean de Lastic

Jean de Lastic was Grand Master of the Order of the Knights Hospitaller from 1437 until his death in 1454.

During his rule, in 1440, an Ottoman fleet attacking Rhodes was successfully repelled.

During this time, the order was at the zenith of its power, and played a significant military role in the defense of the Mediterranean against Turkish encroachment.

[1] His rule still saw the Fall of Constantinople of 1453, initiating a century of Ottoman naval dominance over the eastern Mediterranean.

Under his successor, Jacques de Milly, the order was also divided by internal dispute.