Amulets were everywhere in medieval Jewish life. Pregnant women wore them to prevent miscarriage. Children carried them against the evil eye. Men tucked inscribed parchments into their clothing before travel. A woman could even wear her amulet into the mikveh (ritual bath)—a 1552 Yiddish women's guide reassured readers she committed no sin by doing so. undefined Trachtenberg documented how these objects were the most visible intersection of magic and daily Jewish practice across medieval Europe.
The most common type was the written amulet: a piece of parchment inscribed with sacred names, biblical verses, and angelic formulas. The names of angels—Michael, Gabriel, Raphael—appeared alongside mysterious divine names and letter-combinations drawn from Kabbalistic tradition. Sefer Raziel, the most influential medieval magical handbook, provided templates. Some amulets included geometric shapes and magical seals, though the number-square amulets popular in Islamic and European traditions were rare in Jewish practice.
Gemstones carried their own protective power. Medieval Jews inherited an elaborate system of gem-lore stretching back to the twelve stones of the High Priest's breastplate (Exodus 28:17). Berachya HaNakdan translated a Latin treatise describing the virtues of 73 different gems. Coral was especially valued—Meir of Rothenburg and the Tashbez both mention its protective properties, and it was widely used in children's amulets throughout the Rhineland communities.
The mezuzah (a parchment scroll affixed to doorposts) occupied an interesting borderland. Rashi understood the Talmudic warning about improperly affixed mezuzot as a warning about demonic vulnerability—an unprotected doorpost left the house open to spirits. His grandson Rabbenu Tam took the rationalist view: if placed badly, someone would simply bang into it and get hurt. The debate captures the tension between magical and practical thinking that ran through medieval Jewish life.
Even the Passover afikomen served as an amulet. Kept in the house, it was believed to protect against fire. Some German Jews carried pieces of the unleavened bread year-round. The practice was so widespread that one scholar speculated the non-Jewish German belief that a piece of "Judenmatz" in a house prevents fire may have derived from observing this Jewish custom.