1821. For the Rhine provinces not incorporated in Prussia, with the special object of regulating episcopal elections; concerned Württemberg, Baden, Hesse, Saxony, Nassau, Frankfort, the Hanseatic towns, Oldenburg and Waldeck. This first concordat was immediately suspended, and was not ratified until 1827; it is partially maintained. It had to be replaced by new concordats concluded with Württemberg in 1857 and the grand-duchy of Baden in 1859; but these conventions, not having been ratified by those countries, never came into force.
1824. For the kingdom of Hanover; maintained.
1827. For Belgium and Holland; abandoned by a common accord.
1828 and 1845. For Switzerland, for the reorganization of the bishoprics of Basel and Soleure; in force.
1847. For Russia, never applied by Russia. It was followed by several partial conventions.
1851. For Tuscany; lasted until the formation of the kingdom of Italy.
1851. For Spain, completed in 1859 and 1888; in force.
A convention on the religious orders was concluded in 1904, but had not received the assent of the Senate in 1908.
1855. For Austria; denounced in 1870. Several of its provisions are maintained by unilateral Austrian laws. The emperor of Austria continues to nominate to bishoprics by virtue of rights anterior to this concordat.
1857. For Portugal, completed in 1886 for the Portuguese possessions in the Indies; in force.