The religious poetry of Judaism turned a corner with a prolific hymnist from seventh-century Palestine called Eleazar birabbi Kallir (or Killir). Modern studies of medieval Jewish liturgical poetry, or Piyyut, have increased considerably and many manuscripts and fragments have been discovered in several Genizah collections, offering new material on the tradition of classical hymnists from the period of late antiquity and early Islam. Yosse ben Yosse, Yannai, Shimעon bar Megas, Yehudah, Kallir, and Yohanan ha-Kohen are the outstanding names of synagogue poets who composed their hymns for the weekly sabbath and the festivals, predominantly in Palestinian-Jewish communities.