During 1218-1222 the chronicler Caesarius of Heisterbach mentions a baptized Jewish woman and her mother.
In 1335 the synagogue of Linz is mentioned in a document. It was situated close to the market in the Old Town; the Jews lived close around it. The economic rise of Linz in the second half of the 13th century might have attracted Jews to the town. During the 14th century there was a constant Jewish settlement in Linz. From 1350 until 1420 a dozen Jews, probably with their families, are documented. The main source of income was moneylending. Some Jews were engaged in the trade of wine, meat, grain and other food. One Jew held a fief granted by the duke. Jakob Jechiel Loans was a private physician to Emperor Friedrich III. He stayed in Linz during 1492 in the court of the Emperor. The Jews of Linz were expelled in 1420. The synagogue was rebuilt as a church. In the year1494 the Jews from outside were permitted to visit the fair in Linz.