Pope Boniface VIII
Conflicts with Philip IV

The conflict between Boniface VIII and King Philip IV of France (1268–1314) came at a time of expanding nation states and the desire for the consolidation of power by the increasingly powerful monarchs. The increase in monarchical power and its conflicts with the Church of Rome were only exacerbated by the rise to power of Philip IV in 1285. In France, the process of centralizing royal power and developing a genuine national state began with the Capetian kings. During his reign, Philip surrounded himself with the best civil lawyers and decidedly expelled the clergy from all participation in the administration of the law. With the clergy beginning to be taxed in France and England to finance their ongoing wars against each other, Boniface took a hard stand against it. He saw the taxation as an assault on traditional clerical rights and ordered the bull Clericis laicos in February 1296, forbidding lay taxation of the clergy without prior papal approval. In the bull, Boniface states "they exact and demand from the same the half, tithe, or twentieth, or any other portion or proportion of their revenues or goods; and in many ways they try to bring them into slavery, and subject them to their authority. And also whatsoever emperors, kings, or princes, dukes, earls or barons...presume to take possession of things anywhere deposited in holy buildings... should incur sentence of excommunication." It was during the issuing of Clericis laicos that hostilities between Boniface and Philip began.

At war with both his English and his Flemish vassals, Philip was convinced that the wealth of the Catholic Church in France should be used in part to support the state. He countered the papal bull by decreeing laws prohibiting the export of gold, silver, precious stones, horses, arms, or food from France to the Papal States. These measures had the effect of blocking a main source of papal revenue. Philip also banished from France the papal agents who were raising funds for a new crusade in the Middle East. In the bull Ineffabilis amor of September 1296, Boniface pledged approval of reasonable taxation for genuine emergencies but contested Philip's demands, asking him rhetorically: "What would happen to you—God forbid!—if you gravely offended the Apostolic See, and caused an alliance between Her and your enemies?." In the face of the support of French clergy such as Pierre de Mornay for Philip's general position and the need for French revenue to combat unrest in Rome from the Colonna family, Boniface retreated still further. In February 1297, the bull Romana mater ecclesia permitted voluntary clerical donations without papal approval in times of emergency as determined by the king. On 3 April 1297, seven French archbishops and forty bishops, provided this authorisation, agreed to concede to the King the fifth part of their ecclesiastical revenues under the form of two tithes, the first of which to be paid by Pentecost, the second at the end of September. This subsidy could be collected just in case the war with England should go on, with Church authority and not by means of the secular arm. By July 1297, Boniface yielded completely in the bull Etsi de statu, conceding that kings could raise taxes on church property and incomes during emergencies without prior papal approval. Philip rescinded his embargoes and even accepted Boniface's nuncios as arbitrators to delay and conclude his war with the English, with the 1303 Treaty of Paris restoring the status quo but obliging Edward to come to France in person to do homage for the return of Aquitaine.
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