There he saw a mysterious white cloud, which seemed to beckon him onward.

Titurel followed it, passed through vast solitudes and almost impenetrable woods, and eventually began to climb a steep mountain, whose ascent at first seemed impossible.

Clinging to the rocks, and gazing ever ahead at the guiding cloud, Titurel came at last to the top of the mountain, where, in a beam of refulgent light, he beheld the Holy Grail, borne in the air by invisible hands.

He raised his heart in passionate prayer that he might be found worthy to guard the emerald-colored wonder which was thus intrusted to his care, and in his rapture hardly heeded the welcoming cries of a number of knights in shining armor, who hailed him as their king.
The vision of the Holy Grail was as evanescent as beautiful, and soon disappeared; but Titurel, knowing that the spot was holy, guarded it with all his might against the infidels, who would fain have climbed the mountain.
After several years had passed without the Holy Grail's coming down to earth, Titurel conceived the plan of building a temple suitable for its reception.

The knights who helped to build and afterward guarded this temple were called "Templars." Their first effort was to clear the mountain top, which they found was one single onyx of enormous size.