1 : a knight of a religious military order established in the early 12th century in Jerusalem for the protection of pilgrims and the Holy Sepulcher. 2 : knight templar sense 2.

Why are they called Templars?

The first headquarters of the Knights Templar, on the Temple Mount in Jerusalem. The Crusaders called it "the Temple of Solomon" and from this location derived their name of Templar.

What do the Templars believe?

The Knights Templar was a large organization of devout Christians during the medieval era who carried out an important mission: to protect European travelers visiting sites in the Holy Land while also carrying out military operations.