Tag Archives: Caliph

Jew of the Week: Isaac Judaeus

The Caliph’s Doctor and the Father of Kabbalah

A 13th-century illustration of Isaac Israeli from a Latin translation of his “Book of Fevers”

Itzhak ben Shlomo (c. 832-932) was born to a religious Jewish family in Egypt. He became renowned as the greatest physician in the country, and in 904 was hired by Prince Ziyadat Allah III. Several years later, he became court physician to Caliph Al-Mahdi Billah of the Fatimid Dynasty, based in Kairouan, Tunisia. Recognizing his immense wisdom, the Caliph made Itzhak (known in Arabic as “Abu Yaqub Ishaq ibn Suleiman al-Israili”, and in Europe as “Isaac Judaeus”) his leading advisor and tutor. Itzhak wrote numerous medical, astronomical, and mathematical treatises which transformed the scientific knowledge of the day. For instance, he is the first person in history to mention performing a tracheostomy. His works were widely distributed for centuries afterwards, and made up much of the medical curriculum of the Middle Ages. Itzhak was also a great philosopher, kabbalist, and mystic. He fused together Greek Neoplatonism with traditional Jewish mysticism, paving the way for the forthcoming explosion of Kabbalistic texts and Jewish mystical circles. His main disciple, Dunash ibn Tamim, wrote a profound commentary on Sefer Yetzirah, the most ancient of Kabbalistic texts. In addition to inspiring many rabbis, he was studied and quoted by great non-Jewish scholars like Thomas Aquinas and Roger Bacon. Among his many other writings is a deeply philosophical commentary on Genesis. In his day, Isaac Judaeus was the world’s leading sage, doctor, and scientist, and Arabic texts of the time refer to him as “master of the seven sciences” and “more valuable than gems”.

Why Did Muslims Rule the Holy Land for 1300 Years?

Words of the Week

We do not have to accept theories as certainties, no matter how widely accepted, for they are like blossoms that fade. Very soon science will be developed further and all of today’s new theories will be derided and scorned and the well-respected wisdom of our day will seem small-minded.
– Rav KookFirst Ashkenazi Chief Rabbi of Israel

Jew of the Week: Benjamin of Tudela

The Jew Who Inspired Marco Polo

A 19th century engraving of ‘Benjamin of Tudela in the Sahara’

Binyamin MiTudela (1130-1173) was born to a religious Sephardic family in the town of Tudela, now in Spain. In 1165, he set out for what is believed to be a pilgrimage to Jerusalem. He had a larger objective in mind as well, since this was at the height of the Crusades and a perilous time for anyone to make a pilgrimage, especially Jews. Binyamin wanted to explore all the Jewish communities along the way and to create a detailed map showing the route one should take and where a Jew can find safe refuge on his journey. This would open the door for more Jews to take a trip to their beloved Holy Land. A lover of history and geography, he also wished to leave a record of what the Jewish (and non-Jewish) world looked like in the 12th century. Binyamin recorded all that he saw in his Sefer haMasa’at, “Book of Travels”, also known as Masa’aot Binyamin. His adventures were so popular they were soon translated into just about every European language. Today, the book is among the most important historical documents for scholars of the Middle Ages and the Renaissance, as well as of Jewish and Muslim history. A great deal of what we know about that era, including the daily lives of simple people, comes from his book. Some believe that it was this book that may have inspired another, more famous, adventurer about a century later: Marco Polo. Binyamin’s travels took him to France and the Italian Peninsula, then to Greece and across what is today Turkey to the Near East, then to Persia, back around the Arabian Peninsula, to Egypt, and returning to Iberia by way of North Africa. While in Ethiopia, he describes a large Jewish community, which was a key source of information allowing modern-day Ethiopian Jews to be accepted by the State of Israel and the rabbinate. He is possibly the first writer to detail the community of Al-Hashishin, better known as “Assassins”, as well as among the first to describe the Druze. In Posquières, he meets and describes the great Raavad. In Rome, he sees a Rabbi Yechiel, who is an advisor to the Pope, and has “free access to the Pope’s palace”! While in Baghdad, he writes of the Caliph, who is “like a Pope” for Muslims, and that the Caliph is fluent in Hebrew and knows Torah law extensively, though he rules with an iron fist. All in all, Benjamin of Tudela visited and wrote about some 300 cities. Today, there are streets named after him in Jerusalem and in Tudela, Spain, where there is also a high school bearing his name.

Words of the Week

One day I learned that dreams exist to come true, and since that day I do not sleep for rest. I sleep just to dream.
– Walt Disney