In this dark epoch, when the center of Judaism was destroyed, a favorable change of fortune created a new center. Christian Spain, which had developed great power under the emperor Alfonso Raimundez (1126-1157), became a refuge for the persecuted Andalusian Jews, and Toledo, which had been made the capital of the realm, became a new focus, whence the rays of Jewish science emanated. This favorable change was due to the work of a man who deserves to be ranked with Ibn-Shaprut and Ibn-Nagrela. The wise and philanthropic Emperor Alfonso Raimundez had a Jewish favorite in the person of the still youthful Jehuda Ibn-Ezra, the son of that Joseph Ibn-Ezra, who, together with his three brothers, is celebrated in Judæo-Spanish literature. On taking possession of the border fortress of Calatrava, between Toledo and Cordova (1146), the emperor, probably as a reward for his bravery, appointed Ibn-Ezra commander of the place, and invested him with the dignity of a prince (Nasi). Jehuda Ibn-Ezra was the guardian-angel of his unfortunate co-religionists, who were fleeing before the fury of the victorious Almohades. He assisted them to find homes and employment in Christian Spain, and used his riches in ransoming captives, in clothing the naked and feeding the hungry. The congregation of Toledo was very much increased by the immigrant Jews. Meïr Ibn-Migash opened an academy for the study of the Talmud, and numerous pupils attended it. Jewish learning under the protection of the Christian king, now flourished in Toledo after its expulsion from the Mahometan kingdom.