In 1226, Pope Honorius III resolved a conflict between the Duke of Silesia, Henry I the Bearded, & Bishop Lawrence of Wroclaw, the see of that duchy. Henry alleged that the bishop had subjected the inhabitants of his duchy to “unowed exactions levied as tithes.” Henry alleged a devastating impact of Lawrence’s demands on settlement in his duchy, on his authority over its inhabitants, & implicitly on the entire social, economic, & political order over which he presided. This is a study of the period in which parish churches & tithe revenues are documented. Identifies those features of local churches & tithing that were routine, innovative, & controversial. Assesses directions of change during the period of documentation. Illustrations.