5 In France, at the beginning of this century, after the previous public commotions and terrors had subsided, the rulers themselves understood that they could not more effectually relieve the State, wearied with so many ruins, than by the restoration of the Catholic religion. In anticipation of future advantages, Our predecessor, Pius VII, spontaneously acceded to the desire of the First Consul, and acted as indulgently as was consistent with his duty. And when an agreement was reached as regarded the principal points, the bases were laid, and a safe course marked out for the restoration and gradual establishment of religion. Many prudent regulations, indeed, were made at that and at subsequent times for the safety and honour of the Church. And great were the advantages derived therefrom, which were all the more to be valued in consequence of the state of prostration and oppression into which religion had been brought in France. With the restoration of public dignity to religion, Christian institutions manifestly revived; and it was wonderful what an increase of civil prosperity was the result. For when the State had scarcely emerged from the tempestuous waves and was anxiously looking for firm foundations on which to base tranquillity and public order, it found the very thing which it desired opportunely offered to it by the Catholic Church, so that it was apparent that the idea of effecting an agreement with the latter was the outcome of a prudent mind and a true regard for the people's welfare. Wherefore, if there were no other reasons for it, the same notice which led to the work of pacification being undertaken, ought now to operate for its maintenance. For-now that the desire of innovation has been enkindled everywhere, and in the existing uncertainty as to the future-to sow fresh seeds of discord between the two powers, and by the inter-position of obstacles to fetter or delay the beneficial action of the Church, would be a course void of wisdom and full of peril. And yet we are troubled and grieved to see that perils of this kind are at the present time arising, for certain things opposed to the well-being of the Church have been and are being done, in consequence of the aroused mistrust and hatred of hostile minds against Catholic institutions, which have been wont to represent them as the enemies of the State. We are also no less concerned and anxious at the designs of these who, with the object of dividing the interests of Church and State, would wish to break, more or else rapidly, the salutary compact concluded with the Apostolic See.
Source: Nobilissima Gallorum Gens (Vatican.va)