A treaty of the Holy See is called a Concordat. This is a list.

11th century

• Treaty of Melfi (1059; Normans)
• Treaty of Ceprano (1080) (Normans)

12th century

• Concordat of Worms (1122; Holy Roman Empire)
• Treaty of Mignano (1139)
• Treaty of Constance (1153) (Holy Roman Empire)
• Treaty of Benevento (1156; Sicily)
• Treaty of Venice (1177; Holy Roman Empire, Lombard League)

13th century

• Treaty of Speyer (1209) (Holy Roman Empire)
• Treaty of Ceprano (1230) (Holy Roman Empire)
• Treaty of San Germano (1230; Holy Roman Empire)
• Concordat of the Forty Articles (1289; Portugal)
• Treaty of Tarascon (1291; Aragon, France, Naples)
• Treaty of Anagni (1295; Aragon, France, Naples, and Majorca)

15th century

• Fürsten Konkordat between Pope Eugenius IV and the Princes Electors of the Holy Roman Empire (Jan 1447)
• Concordat of Vienna (1448; Holy Roman Empire)^[1]
• Treaty of Bagnolo (1489; Ferrara, Venice)

16th century

• Concordat of Bologna (1516; France)
• Treaty of London (1518) (France, England, Holy Roman Empire, Spain, Burgundy, and the Netherlands)

18th century

• Treaty of Tolentino (1797; France)

19th century

• Concordat of 1801 (France)
• Concordat of 11 June 1817 (France)
• Concordat of 24 October 1817 (Bavaria)
• Concordat of 16 February 1818 (Naples)
• 1847 Agreement between the Holy See and Russia
• Concordat of 1851 (Spain)
• Concordat of 1854 (Guatemala)
• Concordat of 1887 (Colombia)^[2]

20th century

• Concordat of 1922 (Latvia)
• Concordat of 1925 (Poland)
• Concordat of 1928 (Colombia)
• Lateran Treaty (1929; Italy)
• Prussian Concordat (1929)
• Concordat of 1933 (1933; Austria)
• Reichskonkordat (1933; Germany)
• Concordat of 1940 (Portugal)
• Concordat of 1953 (Spain)
• Concordat of 1993 (Poland)
• Treaties between the Republic of Croatia and the Holy See (1996-1998)

21st century

• Concordat of 2004 (Portugal)
• Treaty of 2004 (Slovakia)
• Concordat of 2008 (Brazil)
• Concordat of 2009 (Schleswig-Holstein)
• Agreement of 2019 (Burkina Faso)