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| YEAR | DATE | EVENT | HEAD OF STATE | |
| 1202 | State of Brethren of the Sword Orders or Livonian Knights | 1 G.M.Wimo von Rohrbach | ||
| 1229 | 2 G.M. Volkwin von Winterstatten | |||
| 1236 | 22 september | 3 G.M. Hermann Balk | ||
| 1237 | 12 may | Provence of State of Teutonic Order | ||
| 1238 | 4 G.M. Ditrich I van Groningen | |||
| 1241 | 5 G.M. Andreas I von Velven | |||
| 1244 | 6 G.M. Heinrich I von Heimburg | |||
| 1245 | 7 G.M. Ditrich II van Groningen | |||
| 1247 | 8 G.M. Andreas II von Stirland | |||
| 1253 | 9 G.M. Eberhard I von Seine | |||
| 1254 | 10 G.M. Hanno von Sangerhausen Teutonic Grand Master | |||
| 1257 | 11 G.M. Burchard von Hornhause | |||
| 1261 | 12 G.M. Georg von Eichstadt | |||
| 1261 | 13 G.M. Werner von Breithausen | |||
| 1263 | 14 G.M. Konrad I von Manstadt | |||
| 1266 | 15 G.M. Otto von Lutterberg | |||
| 1270 | 16 G.M. Andreas III von Westphalen | |||
| 1271 | 17 G.M. Walther I von Nordeck | |||
| 1273 | 18 G.M. Ernst von Ratzeburg | |||
| 1279 | 19 G.M. Gerhard I | |||
| 1280 | 20 G.M. Konrad II von Feuchtwangen | |||
| 1282 | 21 G.M. Mangold von Sternberg | |||
| 1282 | 22 G.M. Wilhelm I | |||
| 1288 | 23 G.M. Konrad III von Herzogstein | |||
| 1290 | 24 G.M. Balthasar Holte | |||
| 1294 | 25 G.M. Heinrich II von Dumpshagen | |||
| 1296 | 26 G.M. Bruno | |||
| 1298 | 27 G.M. Gottfreid von Rogga | |||
| 1305 | 28 G.M. Wennemar I | |||
| 1307 | 29 G.M. Gerhard II von Jocke | |||
| 1326 | 30 G.M. Reimar | |||
| 1328 | 31 G.M. Eberhard II von Monheim | |||
| 1341 | 32 G.M. Burchard I von Dreileben | |||
| 1345 | 33 G.M. Golwin von Hericke | |||
| 1360 | 34 G.M. Arnold von Vietinghof | |||
| 1365 | 35 G.M. Wilhelm II von Frimersheim | |||
| 1383 | 36 G.M. Robin von Eltz | |||
| 1391 | 37 G.M. Wennemar II von Bruggenei | |||
| 1401 | 38 G.M. Konrad III von Vietinghof | |||
| 1413 | 39 G.M. Dietrich II Tork | |||
| 1415 | 40 G.M. Siegried Lander von Spanheim | |||
| 1424 | 41 G.M. Cysse von Rutenberg | |||
| 1433 | 42 G.M. Frank von Kersdorf | |||
| 1435 | 43 G.M. Heinrich III von Buckenorde | |||
| 1438 | 44 G.M. Heinrich IV Vincke von Oberbergen | |||
| 1450 | 45 G.M. Johann I von Mengden | |||
| 1466 | Independent State of Brethren of the Sword Orders or Livonian Knights | |||
| 1470 | 46 G.M. Johann II Wolthusen von Heerse | |||
| 1471 | 47 G.M. Bernhard von dem Borch | |||
| 1483 | 48 G.M. Johann III Freitag von Loringhof | |||
| 1494 | 49 G.M. Walther II von Plettenberg | |||
| 1535 | 50 G.M. Hermann II Brugsenei | |||
| 1549 | 51 G.M. Johann IV von der Recke | |||
| 1551 | 52 G.M. Heinrich V von Galen | |||
| 1557 | 53 G.M. Wilhelm III Count of Furstenberg | |||
| 1559 | 54 G.M. Gotthard Kettler |
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| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER |
| 1562 | 5 march | Duchy of Kurland - dinasty Kettler | duke Gotthard | |
| 1587 | 27 may | duke Friedrich | ||
| 1639 | duke Wilhelm | |||
| 1642 | 26 august | duke Jakob | ||
| 1682 | 10 january | duke Friedrich Kasimir | ||
| 1698 | 22 january | duke Friedrich Wilhelm | ||
| 1711 | 21 january | duke Ferdinand | ||
| 1737 | 4 may | duke Ernest John (I) | ||
| 1741 | Russian occupation | |||
| 1759 | Duchy ok Kurland - Saxony dinasty | duke Charles of Saxony | ||
| 1763 | Kettler dinasty | duke Ernest John (II) | ||
| 1769 | duke Peter | |||
| 1795 | Russian occupation | |||
| 1918 | 12 april | Kingdom | king Guglielmo duke of Wurtemberg | Adolph Konstantin Jakob Freiherr Pilar von Pilchau-Audern |
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| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER |
| 1918 | 18 november | Republic | Janis Cakste (I) | Karlis Ulmanis (I) |
| 1919 | 16 april | Hans Joachim Paul Adolph Freiherr von Manteuffel-Szoege | Hans Joachim Paul Adolph Freiherr von Manteuffel-Szoege | |
| 1919 | 26 april | Oskar Borkowsky | Oskar Borkowsky | |
| 1919 | 11 may | Andrievs Niedra | Andrievs Niedra | |
| 1919 | 29 june | von Timroth | von Timroth | |
| 1919 | 3 july | Janis Cakste (II) | Karlis Ulmanis (II) | |
| 1921 | 17 june | Zigfrids Meierovics (I) | ||
| 1922 | 7 november | Fridrihs Vesmanis | ||
| 1922 | 18 november | Janis Cakste (III) | ||
| 1923 | 25 january | Janis Pauluks | ||
| 1923 | 26 june | Zigfrids Meierovics (II) | ||
| 1924 | 25 january | Voldemars Zamuels (I) | ||
| 1924 | 16 december | Hugo Celmins (I) | ||
| 1925 | 3 november | Pauls Kalnins (I) | ||
| 1925 | 10 november | Janis Cakste (III) | ||
| 1925 | 23 december | Karlis Ulmanis (III) | ||
| 1926 | 4 may | Arturs Alberings | ||
| 1926 | 17 december | Margers Skujenieks (I) | ||
| 1927 | 14 march | Pauls Kalnins (II) | ||
| 1927 | 8 april | Gustavs Zemgals | ||
| 1928 | 21 january | Peteris Jurasevskis | ||
| 1928 | 1 december | Hugo Celmins (II) | ||
| 1930 | 8 april | Pauls Kalnins (III) | ||
| 1930 | 11 april | Alberts Kviesis | ||
| 1931 | 24 march | Karlis Ulmanis (IV) | ||
| 1931 | 5 december | Margers Skujenieks (II) | ||
| 1933 | 23 march | Adolfs Blodnieks | ||
| 1934 | 17 march | Karlis Ulmanis (V) | ||
| 1936 | 11 april | Karlis Ulmanis | ||
| 1940 | 20 june | Augusts Kirhensteins | ||
| 1940 | 21 july | Augusts Kirhensteins | ||
| 1940 | 5 august | 14° Socialist Republic of URSS | Augusts Kirhensteins | Vilis Lacis |
| 1941 | 23 june | German Occupation | ||
| 1944 | 13 october | 14° Socialist Republic of URSS | Augusts Kirhensteins | Vilis Lacis |
| 1952 | 10 april | Karlis Ozolins |
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| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER |
| 1953 | 17 january | |||
| 1959 | 27 november | Janis Kalnberzins | Janis Peive | |
| 1962 | 23 april | Vitalijs Rubenis | ||
| 1970 | 5 may | Vitalijs Rubenis | Jurijs Rubenis | |
| 1974 | 20 august | Peteris Strautmanis | ||
| 1974 | 20 august | Peteris Strautmanis | ||
| 1985 | 22 june | Janis Vagris | ||
| 1988 | 6 october | Anatolijs Gorbunovs | Vilnis Edvins Bresis |
| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER |
| 1990 | 4 may | Republic of URSS | Anatolijs Gorbunovs | Ivars Godmanis |
| 1991 | 6 september | Republic | Anatolijs Gorbunovs | Ivars Godmanis (I) |
| 1993 | 8 july | Guntis Ulmanis | Valdis Birkavs | |
| 1994 | 19 september | Maris Gailis | ||
| 1995 | 21 december | Andris Skele (I) | ||
| 1997 | 7 august | Guntars Krasts | ||
| 1998 | 26 november | Vilis Kristopans | ||
| 1999 | 8 july | Vaira Vike-Freiberga | Andris Skele (II) | |
| 2000 | 5 may | Andris Berzins | ||
| 200x | Einars Repse | |||
| 2004 | 20 february | Indulis Emsis | ||
| 2004 | 29 november | Aigars Kalvitis | ||
| 2007 | 7 july | Valdis Zatlers | ||
| 2007 | 14 december | Ivars Godmanis (II) | ||
| 2009 | 12 march | Valdis Dombrovskis |