Various devices were employed to exclude Jewish merchants. One device was the "rewir".
The purpose of the "rewir" was simple: Jews were not permitted within the "rewir",
thus couldn't trade at the market place. Naturally, Jews found an equally simple way to get
around the "rewir". Jews lined up on the roads entering and leaving the city. As peasants
came to market in the city, the Jews offered the best bargains before the peasants even entered
the (now) empty "rewir". Jews could evade the "rewir" because they really had the
best bargains. Attempts to exclude Jews from the "rynek" or ring around the "rewir"
faired no better. "The Role of Jews in Commerce in Early Modern Poland-Lithuania",
Hundert, Gershon; The Journal of European Economic History, Vol. 16, No. 1, 1987, pp. 258, 259