A concordat is an agreement between the pope and a government or sovereign on religious matters.
- Concordat of Worms (1122) between Pope Calixtus II and Holy Roman Emperor Henry V
- Concordat of 1801 between Pope Pius VII and Napolean
- Lateran treaties (1929) between Italy and Pope formally defining Vatican City
- Concordat of 1933 (Reichskonkordat) between the Holy See and Germany