Rav Kook, born in Palestine, was the rabbi of Zimel and then Boisk before making returning to Palestine in 1904. He was involved with the Mizrachi movement when he became a Rav of Yaffa. In 1921 he became the First Chief Ashkenazi Rabbi of Palestine after moving to Jerusalem two years earlier. Upon becoming the Chief Rabbi, Rav Kook founded a yeshiva, now known as Merkaz HaRav. He was Chief Rabbi of Palestine until his death prior to the Second World War. Rabbi Kook was a mystic, visionary, scholar and leader of his people whose perspective reflects the ancient classical spirituality of Judaism.