דף מספר מגן אברהם (טריסק) עם חותמת רבי יצחק מנחם דנציגר, בעל "עקדת יצחק" מאלכסנדר, וחתימת בנו רבי ישראל.

דף מספר מגן אברהם (טריסק) עם חותמת רבי יצחק מנחם דנציגר, בעל "עקדת יצחק" מאלכסנדר, וחתימת בנו רבי ישראל.
Rebbe Yitzchak Menachem Danziger of Alexander (1880-1942) was a leading rebbe of his times. Educated by his grandfather, founder of the dynasty Rabbi Yechiel of Alexander, by his father Rebbe Shmuel Zvi of Alexander, author of Tiferet Shmuel and by his uncle Rabbi Yerachmiel Yisrael Yitzchak, author of Yismach Yisrael.

In 1924, he was crowned as rebbe, after 70 foremost Polish rabbis, his father's Chassidim, requested that he continue leading the dynasty. During his leadership, the Alexander Chassidic community in Poland grew and numbered tens of thousands of Jews. With his brother Rabbi Avraham Chaim Danziger, he founded the chain of the Beit Yisrael Yeshivot in memory of his uncle the author of Yismach Yisrael. He was murdered in the Holocaust with all his children and grandchildren. After the Holocaust, the remaining Alexander Chassidim gathered around his cousin Rabbi Yehuda Moshe Tehiberg and crowned him as Rebbe. These Chassidim compiled whatever remained of his Torah writings and printed them in the book Akedat Yitzchak.