Hello everyone! Please visit this site for my translation of Rabbi Moshe Cordovero’s classic Tomer Devorah (The Kabbalah of Forgiveness), a text often studied at precisely this time of year as we strive to improve our relationships with each other, with G-d, and with ourselves. The site also features a series of brief videos on each…

The Jews of the Danube Fall 2018 Lecture Series From its headwaters in Germany’s Black Forest to its final destination in the Black Sea, the Danube River flows through ten countries and over ten centuries of Jewish history. Great cities like Vienna and Budapest punctuate its course through East-Central Europe, the cradle of much of…

The invisible yet palpable echo of the crypto-Jewish tradition resonates through Portugal like the far side of a conversation faintly overheard in another person’s cell phone. A rush of sibilants or an exclamation of laughter confirms the reality of the distant interlocutor, even though we do not see her before us. The history of Portugal’s…

Join me in this global effort to prepare for Rosh Hashanah and Yom Kippur this year!

Hasidim of the Aish Kodesh should take note: this is likely the face of one of the murderers of Rabbi Kalonymus Kalmish Shapira hy”d. Jakiw Palij, a longtime resident of Queens, New York, was recently extradited to Germany for filing false information while immigrating to the United States after World War II. Palij served as…

Hello students, friends and colleagues– We still have a few hours before the onset of Shabbat and the possible arrival of Mashiach, but if we have to make it through another Tisha B’Av– If you are in Fort Lee, NJ Sunday morning or Crown Heights, Brooklyn Sunday afternoon, please join me for presentations on the…

Thanks to Ben Rothke for this kind review of Torah from the Years of Wrath in this week’s Jewish Link of New Jersey. I am very grateful to be a part of the community that values and spreads the teachings of the Piaseczno Rebbe; nice to see positive reviews! Keeping the Faith By Ben Rothke…

  Hello everyone– My father’s yortsayt is coming up next week, and as in previous years I hope to begin another cycle of study of Maimonides on Teshuvah. Please visit the Maimonides on Teshuvah page page to learn more about how to participate in this free, Global Study of Maimonides program. Posts will also appear…

Their screams suffuse the entire universe, and yet the universe does not revert to primordial waters. It continues to exist as if completely unaffected, Heaven forbid.

It was about this time of year, five hundred years ago, when we were refugees seeking asylum in Portugal. Then they seized our children. If we don’t care about what has been happening to migrant families today—shame on us.

Hoping that Moshiach will arrive before July 22. If not, then this is a great time to listen to the insights of Rabbi Zev Goldberg on the traditional Kinot. I’ll provide historical context. We did this last year and it was really meaningful. Hopefully this is the last Tisha B’Av we will have to mark…

After a discussion of Jewish communal structure in the medieval era, we will look at the devastation of the First Crusade and the Rhineland Massacres of 1096, follow up with some thoughts on the long-term impact on Ashkenazi Culture. Premiering today at 1 pm.

Here’s the latest videos from the Jewish History Lab series.

Brief review of the troubled journey of Rabbi Moshe Hayim Luzzatto, a brilliant young scholar of the 18th century who was persecuted by opponents and hounded across Europe before finding his way to the more tolerant intellectual climate of Amsterdam.

//embed.chabad.org/multimedia/mediaplayer/embedded/embed.js.asp?aid=5035317&width=auto&height=auto&HideVideoInfo=false “Truth will Sprout from the Earth: Gutenberg, the Internet, and the New Uncertainty Principle.” Presentation at the XIII International Torah and Science Conference, Miami. Introductory remarks by Dr. Nathan Katz.

Runaway Yeshiva Bochur’s Work May Aid COVID Research The Jewish Star (March 24, 2021) Shortly after emigrating to Israel in 1901, this Telz-educated orphaned son of a rosh yeshiva earned an unlikely nickname: “the crazy fly-catcher.” Israel Aharoni’s odyssey into the world of middle eastern zoology, long recognized in the scientific world with over 30…

Really thrilled to be part of the inaugural visiting faculty of the Ashkenazium! Please check out this introductory video that beautifully captures the historic “vibe” of the school and its Dean, Dr. Michael Chigel.

A brief overview of the history of Jewish life in Egypt. After looking briefly at the Exodus itself, we look at some major population centers in Elephantine, Alexandria, and Cairo, to the present day. To avoid any possible confusion: this lecture does not argue for continuity between the Jewish population described in the account of…

A brief look at the social and economic background of the post-Talmudic era in Baghdad, with an important digression into the 8th-10th century revolution in information technology that helped propel the authority and influence of the Geonim. The following video will look at the early history of North Africa, an area influenced by their scholarship…

Premiering today at 12:00 noon ET.

Preliminary remarks on the study of the Jews in Africa, followed by The Jews of Ethiopia (origins to 1862). Premiering today at 12 noon ET. Note: for some reason this particular topic attracts an unusual amount of inappropriate commentary. Scholarly, collegial discussion is welcomed here; but I intend to remove hateful remarks, and commentators who…