For the award, please see Order of Kahless.
The Followers of Kahless were a Klingon group, which included the Guardians. They awaited the return of Kahless at Boreth. However, the monastery they occupied on the planet was not only built to house them, but also to protect and guard the rare time crystals native to the planet. (TNG: "Rightful Heir"; DIS: "Through the Valley of Shadows")
In the 2250s, Chancellor of the Klingon High Council L'Rell directed her son to become a monk on Boreth, so that he would be raised by the most devout followers of Kahless. (DIS: "Point of Light")