Responsa of leading rabbis and heads of talmudic academies who lived approximately in the 6th through early 11th centuries and answered questions on talmudic interpretation, practical law, and Jewish thought.
Collection of responsa published from a manuscript discovered in Chevron in the 19th century.
Toratan shel Rishonim
Collection of responsa and a range of other geonic writings, published from manuscripts in the 19th-century.
Epistle of Rav Sherira Gaon
Influential 10th-century letter detailing the development of rabbinic literature from the Mishnah to the Geonim.
Musafia Teshuvot HaGeonim
Collection of responsa and talmudic commentary published from manuscript in the 19th century.
“The first ones” - leading rabbis and legal authorities who lived in the 11th through 15th centuries, whose responsa overwhelmingly focus on legal issues.
Maharach Or Zarua Responsa
13th-century responsa composed by Ashkenazi decisor Rav Chaim Eliezer, the son of the Or Zarua.
15th-century responsa by a student of the Mahari Weil; one of the main sources quoted in the Rema’s glosses on the Shulchan Arukh.
15th-century responsa composed in Germany by a student of the Maharil, quoted often in the Rema’s glosses on the Shulchan Arukh.
12th-century collection of responsa and public letters on topics like the world to come and heresy.
14th-century responsa by the Rashba, a student of the Ramban, with more than 3000 decisions; quoted often in the Shulchan Arukh.
15th-century responsa of the North African Rav Shimon ben Tzemach Duran, with a number of letters on math, history, and grammar.
Shut min haShamayim
13th-century responsa recording answers that the author, a French Tosafist, received from the heavens in his dreams.
15th-century responsa of the Austrian Rabbi Yisrael Isserlin, quoted often in the Rema’s glosses on the Shulchan Arukh.
15th-century responsa of Rav Shlomo Duran, son of the Tashbetz.
Teshuvot HaRi Migash
12th-century responsa of the Spanish Rav Yosef ibn Migash, a student of the Rif, originally composed in Arabic.
13th-century responsa composed in Spain, first published in the 20th century.
14th-century responsa of Rav Isaac ben Sheshet, who lived in Spain and North Africa, quoted often in the Shulchan Arukh.
14th-century responsa composed primarily in Spain with German influences, quoted often by the author’s son, the Tur, and the Shulchan Arukh.
13th-century responsa composed in Germany, with a focus on monetary issues and the suffering of German Jews under heavy taxation.
15th-century responsa composed by the leading Italian rabbinic figure of the time, quoted often in the Rema’s glosses on the Shulchan Arukh.
15th-century responsa composed in Germany, quoted often in the Rema’s glosses on the Shulchan Arukh.
“The later ones” - leading rabbis and legal authorities who lived in the 16th through 20th centuries, whose responsa overwhelmingly focus on legal issues.
Rabbi Nissim Chaim Moshe Mizrachi’s 18th-century responsa and insights on the four sections of the Shulchan Arukh.
17th-century responsa by Rabbi Yissachar Eilenburg.
19th-century responsa by Rabbi Yitzchak Elchanan Spector, a leading rabbi in Russia.
19th-century responsa by a leading German rabbi of the era, the author of the Arukh L’Ner.
17th-century responsa composed by the rabbi of the Ashkenazi community in Amsterdam, with questions from communities throughout Europe.
14th-century abridgement of selected responsa of the Rosh, compiled by his student and published in the 18th century by the Chida.
Chiddushei HaRim Responsa
19th-century responsa from Rabbi Yitzchak Meir Rotenberg-Alter, founder of the Ger chasidic dynasty.
16th-century collection of responsa by Rabbi Yitzchak Adarbi, leading rabbi in Salonica.
HaElef Lekha Shlomo
19th-century responsa of Rav Shlomo Kluger, arranged according to the sections of the Shulchan Arukh.
17th-century responsa cited frequently by later authorities.
19th-century responsa of a leading rabbi in Frankfurt and son-in-law of the Arukh L’Ner.
Melamed Leho'il Part I
20th-century responsa of Rav David Tzvi Hoffman on topics discussed in the Orach Chaim section of the Shulchan Arukh.
Melamed Leho'il Part II
On topics discussed in the Yoreh De’ah section of the Shulchan Arukh, like ritual slaughter and kashrut.
Melamed Leho'il Part III
On topics discussed in the Even HaEzer (family law) and Choshen Mishpat (financial law) sections of the Shulchan Arukh.
Noda BiYhudah I
Influential 18th-century responsa of Rabbi Yechezkel Landau, known for the primacy it grants to the Talmud as a source of law.
Noda BiYhudah II
Second volume published posthumously by the author’s son, who added 60 of his own responsa.
16th-century responsa of the chief rabbi of Egypt, with more than 2000 decisions.
Highly influential 19th-century responsa by Rabbi Moses,Sofer, a rabbi dedicated to upholding Orthodoxy in the midst of the Enlightenment.
16th-century responsa composed in Greece.
19th-century responsa of the Ben Ish Chai, composed in Baghdad.
16th-century responsa composed in Poland by the author of the glosses on the Shulchan Arukh.
18th-century responsa of Rav Yaakov Emden, quoted often by later authorities.
19th-century responsa composed in Poland, one of the first to discuss the use of timers on Shabbat.
Teshuva MeAhava Part I
19th-century responsa by a primary student of the Noda B’Yehuda.
Teshuvot Bayit Chadash
17th-century responsa of Rabbi Yoel Sirkis, also known as the Bach.
17th-century responsa published posthumously by the author’s children.
16th-century responsa by the author of the Yam Shel Shlomo.
Responses to questions sent from all over the world to rabbis in the Eretz Hemdah Institute in Jerusalem, succinct in style but with detailed sources.
Collected Responsa in Wartime
Responsa published by a central, interdenominational chaplaincy committee in the US army addressing questions that arose during World War II.
Collected Responsa to Chaplains
Supplement to “Collected Responsa in Wartime,” published in 1953.
Responsa compiled by the second Sephardic Chief Rabbi of the State of Israel over the course of his tenure from 1955 through 1972.
Growing collection of responsa from the Lindenbaum Center for Halakhic Studies at Yeshivat Chovevei Torah Rabbinical School.
20th-century multi-volume responsa of Rav Ben-Zion Uziel, the first Sephardic chief rabbi of Israel.
Responsa are answers and rulings written by rabbinic leaders in response to questions, ranging from post-talmudic to contemporary. They demonstrate the actualization of halakhah (Jewish law) and values in situations not explicitly addressed in legal codes and often serve as precedents for future cases.
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