In modern Nikopol there is a plaque dedicated to famed Jewish schollar Joseph Karo and a small park called Beit Yosef, another name for his seminal work Shulchan Aruch.
Codifying the various Jewish legal traditions, prayers, holidays, eating precepts, marriages, divorces and civil law is a huge task. The man who did it was Rabbi Joseph Karo (1488-1575). His monumental Shulchan Aruch is now known to every Jew and his abode in Safed has become a pilgrimage site. What is less known about the 16th century Jewish scholar and mystic is that he actually spent some of his life in the Bulgarian lands.
Jospeh Karo was born in a Sephardi family in Toledo, Spain. He was expelled from his home at the age of four, in 1492. During the next several decades his family migrated through various parts of the Ottoman Empire: Adrianople, Salonica and what is now a nondescript little town at the Bulgarian shore of the River Danube, Nikopol. It was in Nikopol that Karo started work on his Kessef Mishneh, a book of commentary on Maimonides, the medieval Jewish philosopher.
One anecdote attributed to Karo is his encounter with a zealous student. "Name the five volumes of the Shulchan Aruh," the rabbi said. The student, thinking that the rabbi had made a slip of the tongue, named the four volumes, but the rabbi asked him to name the fifth.
"There is no fifth volume," the student said.
"There is indeed," the rabbi said. "Common sense is the fifth volume, and if you don't have it, all your rulings will be of no use, even if you know the other four volumes by heart."