A Klingon Great House of old imperial blood, home to the Dahar master Kor and, in the 2250s, to the ambitious Kol and his father Kol-Sha, rivals of T'Kuvma's followers.
The House of Kor takes its name from the family of Kor, the Klingon commander who occupies Organia in the Original Series episode Errand of Mercy and returns as an ageing Dahar master in Deep Space Nine's Blood Oath, The Sword of Kahless and Once More Unto the Breach. The last of these establishes that Kor's line descends from the old imperial family, and that his snobbery once blocked Martok from becoming an officer.
Discovery shows the house at the height of its power. Kol, who answers T'Kuvma's beacon in Battle at the Binary Stars, seizes the Ship of the Dead and leads the war against the Federation until he is killed at Pahvo. In Point of Light his father Kol-Sha tries to topple Chancellor L'Rell.
Kor himself appears as a younger commander in the Strange New Worlds episode A Case of Chiaroscuro, governing the occupied Mat'aar system.