||R. Solomon Zalman b. Hayyim Judah Leib Auerbach (1910-1995) was born in the Shaarei Chessed neighborhood of Jerusalem founded by his maternal grandfather, R. Solomon Zalman Porush, after whom he was named. As a teenager he attended the Ez Chaim Yeshiva in Jerusalem. Following his marriage he studied under R. Zvi Pesah Frank at Kollel Kerem Zion which focused on the laws of the Land of Israel.
His first major published work, Meorei Esh, was the first ever written on the subject of using electricity on Shabbat. The work was endorsed by R. Chaim Ozer Grodzinski who read it and declared: "Or hadash al Tziyon ta'ir" — "A new light will shine upon Zion" — a quote from the daily morning prayers. He became the pre-eminent Halakhic decisor of his time in Israel, respected by all streams of Orthodox Judaism. He was unique in his approach to Halakha through thought experiments.
Renowned for his lucid classes as Rosh Yeshiva, his thousands of students continue to influence the Torah world today. An estimated 300,000 - 500,000 people attended his funeral in 1995.