Hirsch Bär Fassel (1802-1883; also known as Hirsch Baer Fassel or Hirsch B.
Fassel) was an influential rabbi and philosopher.
He was born in Boskowitz.
His book Mozene Zedek, a manual for rabbis on Talmudic decisions on practical matters, urged other rabbis to be lenient in making rulings against individuals in non-criminal matters.
Fassel believed that reforms in Judaism were legitimate, so long as they were brought about by rabbis.
Hirsch was a prolific writer who often had his sermons published in the Jewish press, and who was a frequent contributor to Austrian Jewish newspapers.
In addition to Mozene Zedek, he wrote and published at least a dozen other books.
His manuscript of Mozene Zedek is on display at the Hebrew Union College.
His daughter Rosa Sonneschein was the founder of the American Jewess.