Pope Innocent III: Letter on the Jews
We decree that no Christian shall use violence to compel the Jews to accept baptism. But if a Jew, of his own accord, because of a change in his faith, shall have taken refuge with Christians, after his wish has been made known, he may be made a Christian without any opposition. For anyone who has not of his own will sought Christian baptism cannot have the true Christian faith. No Christian shall do the Jews any personal injury, except in executing the judgments of a judge, or deprive them of their possessions, or change the rights and privileges which they have been accustomed to have. During the celebration of their festivals, no one shall disturb them by beating them with clubs or by throwing stones at them. No one shall compel them to render any services except those which they have been accustomed to render. And to prevent the baseness and avarice of wicked men we forbid anyone to deface or damage their cemeteries or to extort money from them by threatening to exhume the bodies of their dead....
Source: Medieval Sourcebook