Another name for the Chamber of Mazarbul in Moria. It was situated on the seventh level on the mines, near the 21st Hall of the North End. Originally, it held chests containing inscribed stone tablets and the ancient books of the Dwarves. However, following the Dwarves' flight from Moria after the coming of the Balrog in TA 1980, the Chamber was plundered by Orcs. By the time of the War of the Ring, none of the original records remained.

Balin later used the Chamber as a throne-room when he took up residence in Moria in TA 2989.