House Mitsobar became the ruling house of Altara when Tylin Quintara Mitsobar was crowned queen of Altara. Because of Altara's autonomous nature, the monarch's power does not extend much beyond the borders of the capital of Ebou Dar.
When the Seanchan invaded Altara in 1000 NE as part of the Corenne, High Ladies Tuon Athaem Kore Paendrag and Suroth Sabelle Meldarath are welcomed by Queen Tylin. Both of the Seanchan women tell Tylin that her rule will soon expand to all of Altara. When Tylin is killed, her son Beslan Mitsobar becomes King of Altara and High Seat of House Mitsobar.