Ilanz/Glion is a municipality in the district of Surselva in the Swiss canton of Graubünden. On 1 January 2014 the former municipalities of Castrisch, Ilanz, Ladir, Luven, Pitasch, Riein, Ruschein, Schnaus, Sevgein, Duvin, Pigniu, Rueun and Siat merged into the new municipality of Ilanz/Glion.HistoryCastrisch is first mentioned in 765 as Castrices. Ladir is first mentioned about 850 as Leitura. Luven is first mentioned in 765 as Lobene. Pitasch is first mentioned about 801-50 as Pictaui though this comes from a 16th Century copy of the lost original. In 960 it was mentioned as in Pictaso. Riein is first mentioned in 765 as Renino. In 960 it was mentioned as Raine. Ruschein is first mentioned in 765 as Rucene. Schnaus is first mentioned about 840 as Scanaues. Sevgein is first mentioned about 840 as Soviene. Duvin is first mentioned about 840 as Auna. In 1290 it was mentioned as Aiuns Rueun is first mentioned in 765 as Ruane. Until 1943 Rueun was known as Ruis. Siat is first mentioned about 840 as Septe. Until 1943 Siat was known as Seth.