As an earnest student of canon law Paul V. was too inclined to maintain all the rights and privileges of the Church as they were expounded in the decretals of the Middle Ages. This attitude of mind brought him into a prolonged and inglorious conflict with the republic of Venice. This latter state, regardless of the /privilegium fori/ imprisoned two clerics without reference to the ecclesiastical authorities, and about the same time gave great offence by passing laws rendering it difficult for the Church to acquire ownership of landed property, to build new churches or monasteries, or to found new religious orders or societies. Paul V. lodged a solemn protest against these innovations. When his demands were not complied with he issued a sentence of excommunication against the Doge, Senate, and Government, and later on he placed Venice under interdict (1606). The quarrel was so bitter that at one time it was feared that it might end in separating the republic from the centre of unity. Cardinals Baronius and Bellarmine entered the lists in defence of the Pope, while the notorious ex-Servite, Paul Sarpi[10] (1552-1623), undertook to reply to them on behalf of Venice. The government forbade the promulgation of the interdict, and threatened the most severe punishment against all clergy who should observe it. With the exception of the Jesuits, Capuchins, and Theatines who were expelled, the clergy both secular and regular took no notice of the interdict. It was feared that in the end the issues could be decided only by war in which Spain was prepared to support the Pope, but through the friendly intervention of Henry IV. of France peace was concluded without any very decisive victory on either side (1607). The clergy who were expelled for obeying the interdict were allowed to return except the Jesuits. These latter were permitted to settle in Venice again only in 1657.