Rishonim
With the decline of the gaonate in the first half of the eleventh century, the Jews of various countries lost the central spiritual authorities who had hitherto given their decisions in doubtful problems. Thenceforth the appeal in religious and legal questions was to be made to the rabbinical authorities of one's own or a neighboring country, so that inquiries sent during this period to Babylonia were rare and exceptional.
Read more about this topic: History Of Responsa