A Yellow Piece of Cloth

Among us too the Jews were foremost merchants, and they also carried on trade in slaves; it is known that Saint Adalbert ransomed people from them. In 1076 only a thousand Jews were permitted to live in Prague, and the remaining four thousand or so were driven out. Even then they wore a yellow piece of cloth to distinguish them from Christians — and the yellow colour as a mark of the Jews is said to have been devised by the Mohammedans.