Two authoritative versions of the Ashkenazi siddur were those of Shabbetai Sofer in the 16th century and Seligman Baer in the 19th century; siddurim have also been published reflecting the views of Jacob Emden and the Vilna Gaon.
two authoritative versions of the ashkenazi siddur were those of shabbetai sofer in the 16th century and seligman baer in the 19th century; siddurim have also been published reflecting the views of jacob emden and the vilna gaon