1749 (7 Sivan 5509) COUNT VALENTINE POTOCKI (Lithuania)
Was burned at the stake in Vilna. The Count, along with his friend Zeremba, had met an old Jew in a tavern and promised to convert if he could convince them of the pre-eminence of Judaism. Potocki converted and eventually settled in Vilna. Zeremba, hearing that his friend converted, did likewise and moved to Eretz Israel. Potocki's presence in Vilna became known and he was put on trial for heresy. He refused to recant and was burned at the stake. His ashes were collected and buried in Vilna. On his tomb is written "Abraham Ger Zedek" (a righteous proselyte). The Jews of Vilna would visit his grave and say Kaddish.