[2] Gagin was the first individual to hold both the positions of Hakham Bashi and Rishon Lezion simultaneously following their merger.

[1] This appointment granted him formal recognition as the representative of the Jewish community to the government, endowing him with judicial, religious, and civic authorities.

[1] Regarded as one of the foremost poskim (Jewish legal decisors) of his era, Gagin also oversaw the Tiferet Yerushalaim Yeshiva.

[1] Among his notable works is Sepher Hatakanoth Vehaskamoth, a compendium of Jewish religious rites and customs as practiced in the City of Jerusalem.

This proclamation led Muslim authorities to recognize the Samaritans as a Jewish sect, saving them from persecution and extermination.