Cadi , the Sursilvan for "House of God" (Casa Dei), is the historical name of Disentis Abbey and its feudal territories, later part of the Grey League.

The territories in the upper Anterior Rhine valley (Surselva ) were given to Disentis Abbey, and thus removed from the direct rule of Raetia Curiensis, by Tello, Bishop of Chur (d. 765). The territory was divided into Sursassiala ("above the gorge", referring to Punt Russein) and Sutsassiala ("below the gorge"). Sursassiala comprised the modern municipalities of Disentis/Mustér, Medel (Lucmagn) and Tujetsch (the latter containing the upper reaches of the Anterior Rhine, with no permanent settlements until the 9th century), Sutsassiala included Sumvitg , Trun and Breil/Brigels . The subjects of Disentis Abbey first used their own seal in 1285.