Jews and Christians both believe that we are living in the Messianic End Times. Jews were already predicting the End Times some 800 years ago, right around the time Christian End Times eschatology really got going.
One of the most important rabbis in connection with this theme of the End Times is Judah Ben Samuel, also known as Judah he-Hasid (Judah the Pious). He lived and worked from the end of the 12th century until the beginning of the 13th century in Regensburg, Germany and authored a number of books. I would like to single out two of his works: “The Book of the Pious – Sefer Hasidim” and the “Book of Calculations – Sefer Gematriyot,” which deals with biblical numerology and astrology.
Following the Christian crusades to the Holy Land (1096-1270) a regular correspondence developed between the Jews in the Holy Land and the Christian Occident in the West. Thus, for example, the rabbis in Worms and Regensburg in Germany knew that Saladin’s Ayyubids had been ruling in the Holy Land since 1187.