Modern scholars have identified several mystical brotherhoods that functioned in Europe starting in the 12th century. Some, such as the "Iyyun Circle" and the "Unique Cherub Circle", were truly esoteric, remaining largely anonymous. The first documented historical emergence of Theosophical Kabbalistic doctrine occurred among Jewish Sages of Provence and Languedoc in southern France in the latter 1100s, with the appearance or consolidation of the mysterious work the "Bahir" (Book of "Brightness"), a midrash describing God's sephirot attributes as a dynamic interacting hypostatic drama in the Divine realm, and the school of Isaac the Blind (1160–1235) among critics of the rationalist influence of Maimonides. From there Kabbalah spread to Catalonia in north-east Spain around the central Rabbinic figure of Nahmanides (the "Ramban") (1194–1270) in the early 1200s, with a Neoplatonic orientation focused on the upper sephirot. Subsequently, Kabbalistic doctrine reached its fullest classic expression among Castilian Kabbalists from the latter 1200s, with the "Zohar" (Book of "Splendor") literature, concerned with cosmic healing of gnostic dualities between the lower, revealed male and female attributes of God.