The "Amidah" (or "Shemoneh Esreh") prayer is traditionally ascribed to the Great Assembly (in the time of Ezra, near the end of the Biblical period), though other sources suggest it was established by Simeon HaPakoli in the late 1st century. Even in the 1st century, though, the precise wording of the blessings was not yet fixed, and varied from locale to locale. By the Middle Ages the texts of the blessings was nearly fixed, and in the form in which they are still used today.