Robert de Sablé was the Grand Master of the Knights Templar from 1191 to 1193 and Lord of Cyprus from 1191 to 1192.

Despite only having a short tenure, Sablé's reign was filled with successful campaigning. Before his election as Grand Master he led Richard I's navy from England and Normandy to the Mediterranean getting involved in the Reconquista in passage. The might of Richard the Lion Heart's strategy, seasoned troops, and the elite Templar knights scored many victories. During the Third Crusade, they laid siege to the city of Acre, which soon fell. Throughout August 1191, they also recaptured many fortresses and cities along the Palestinian coast, which had been lost previously.

The new coalition's finest hour was the Battle of Arsuf, 7 September 1191. Saladin's Muslim forces appeared to have become far stronger than the Christians, and a decisive victory was desperately needed. Pooling all of the crusader's strength, the Knights Hospitaller joined the ranks, plus many knights from Sablé's native Anjou, Maine, and Brittany. They met Saladin's troops on the dry plains and soon broke his ranks. Those who stayed to fight were killed, and the remaining Islamic troops were forced to retreat.