Their conquest of the Carpathian Basin is the principal subject of the "Gesta Hungarorum". The "Gesta" was written after 1150 by an unidentified author, who is referred to as Anonymus in modern scholars' works. He wrote primarily of the Magyars' battles with six local rulers, including Menumorut, who are not named in other annals and chronicles. On the other hand, Anonymus did not write of Svatopluk I of Moravia, Luitpold of Bavaria, and other local rulers whose fights with the conquering Magyars were described in late 9th-century or early 10th-century sources.