プラノ・カルピニ
It was mentioned by the Arab geographer al-Gharnati and the Persian Qazwini, among others, and recorded as "the land of the Saksins" in the report of Friar Benedykt Polak about the 1246 trip of Giovanni da Pian del Carpine through the camp of Mongol prince Batu Khan on the shores of the Volga. S.A. Pletneva locates Saksin between present Volgograd and Akhtubinsk.