Saul Lowenstam (1717—June 19, 1790) was a renown Dutch rabbi and talmudist.

Saul Lowenstam was born in 1717 in Rzeszów to his parents Aryeh Leib ben Saul (who was the rabbi in Rzeszów at the time) and Miriam the daughter of the Chacham Tzvi. He married Hendele the daughter Abraham Kahana, who was rabbi of Grodno[citation needed], Ukraine. His first rabbinical position was in Lokachi, Ukraine (located in the Lokachi Raion and named Lakacz in Yiddish), followed by Dubno where he succeeded his father-in-law.

After the death of his father in 1755, Lowenstam succeeded him as the Chief Rabbi of Amsterdam, Netherlands. Lowenstam died in Amsterdam on June 19, 1790. He was succeeded as Chief Rabbi by his son, Jacob Moses Lowenstam.

Lowenstam was the author of the Binyan Ariel published in Amsterdam 1778. He also authored a Torah Commentary HeChatzer HaChadasha published in Amsterdam in 1768. A pamphlet titled Halacha Lema'aseh Rav published in Amsterdam in 1828 contains his 1783 halachic ruling asserting the kashrut of Dutch cheese.

Works:

• Binyan Ariel online at HebrewBooks.org
• HeChatzer HaChadasha online at HebrewBooks.org
• Halacha Lema'aseh Rav online at HebrewBooks.org

Source: http://en.wikipedia.org/wiki/Saul_Lowenstam

English translation of the sefer Binyan Ariel