Rabbi Yaakov Isaac Horowitz (Hebrew: יעקב יצחק הורוביץ), known as "The Seer of Lublin" (החוזה מלובלין), ha-Chozeh MiLublin, was a Hasidic rebbe from Poland.
Rabbi Yaakov Isaac Horowitz (Hebrew: יעקב יצחק הורוביץ), known as "The Seer of Lublin" (החוזה מלובלין), ha-Chozeh MiLublin; c. 1745 - August 15, 1815) was a Hasidic rebbe from Poland.
A leading figure in the early Hasidic movement, he became known as the "seer" or "visionary" due to his purported ability to gaze across great distance by supernatural means. He was a disciple of the Maggid of Mezritch. He continued his studies under Rabbi Shmelke of Nilkolsburg and Rabbi Elimelech of Lizhensk. He lived for a while in Lantzut before moving to Lublin.
After Rabbi Yaakov Yitzchak moved to Lublin, thousands of Hasidim flocked to learn from him. Among his disciples were such Hasidic luminaries as rabbi Yaakov Yitzchak Rabinowicz ("The Holy Jew"), Rabbi Simcha Bunim of Peshischa, Rabbi Meir of Apta, Rabbi David of Lelov, the Yismach Moshe, Rabbi Tzvi Elimelech of Dinov, Rabbi Naftali Zvi of Ropshitz, the Ma'or Vashemesh, and Sar Shalom of Belz. The Seer of Lublin also gained a reputation as a miracle-worker who could accomplish the tikkun, or repair of the soul, of those who sought his assistance and guidance. During his stay in Lublin, Yaakov Yitzchak was opposed by a prominent rabbi, Rabbi Ezriel Horowitz.
Rabbi Yaakov Yitzchak was a descendant of Isaiah Horowitz (Hebrew: ישעיה הלוי הורוביץ), also known as the Shelah ha-Kadosh (Hebrew: של"ה הקדוש), a prominent rabbi and mystic, and his maternal grandfather, Rabbi Yaakov Koppel Likover, also a prominent rabbi, a scholar, and a contemporary of the Ba'al Shem Tov.
He was injured in a fall from a window on Simchat Torah night, following HaKaFos,[ and died almost a year later on Tisha B'av  from injuries relating to this fall. He is buried in the Old Jewish Cemetery, Lublin.
In a compilation of these works, entitled Torat HaChozeh MiLublin, his commentaries are arranged alphabetically according to topics and according to the weekly Torah portion.
May the merit of the tzadik Rabbi Yaakov Isaac Horowitz protect us all. Amen