The Concordat of 1801 was an agreement between Napoleon Bonaparte and Pope Pius VII, signed on 15 July 1801 in Paris. It remained in effect until 1905, except in Alsace–Lorraine, where it remains in force. It sought national reconciliation between revolutionaries and Catholics and solidified the Roman Catholic Church as the majority church of France, with most of its civil status restored. This resolved the hostility of devout French Catholics against the revolutionary state. It did not restore the vast Church lands and endowments that had been seized during the French Revolution and sold off. Catholic clergy returned from exile, or from hiding, and resumed their traditional positions in their traditional churches. Very few parishes continued to employ the priests who had accepted the Civil Constitution of the Clergy of the revolutionary regime. While the Concordat restored much power to the papacy, the balance of church-state relations tilted firmly in Napoleon's favour. He selected the bishops and supervised church finances.

A concordat is a convention between the Holy See and a sovereign state that defines the relationship between the Catholic Church and the state in matters that concern both, i.e. the recognition and privileges of the Catholic Church in a particular country and with secular matters that affect church interests.