Kazad Kolzhan was a fortress constructed by the Dwarfs to protect the Haz Drazh Kadrin, the largest pass through the Black Mountains.
The fortress was a stout keep of hewn stone with a broad, thick gate bound by iron strips and sentinelled by a quartet of watch towers. From atop the watch towers, one could peer far into the Old World, even seeing the rough shape of the Elven city of Kor Vanaeth with the aid of a spyglass. [1a]
During the War of the Beard, Kazad Kolzhan served as the fortress of Prince Snorri Halfhand after the Dwarf prince had retreated following the ignominious defeat of the Dwarf army at the Third Siege of Tor Alessi. [1b] Its fate following the Time of Woes is not recorded.