Asturias (including Galicia from 739 and Leon from 855)
Pelayo c. 718–c. 737
Favila c. 737–739
Alfonso I 739–757
Fruela I 757–768
Aurelio 768–774
Silo 774–783
Mauregato 783–788
Bermudo I 788–791
Alfonso II 791–842
Ramiro I 842–850
Ordoño I 850–866
Alfonso III
(Kingdom divided between three sons) 866–910

Asturias
Fruela II 910–925

Leon
García I 910–914
Ordoño II 914–924

Galicia
Ordoño II 910–924

Leon (including Asturias and Galicia)
Fruela II 924–925
Alfonso IV c. 925–c. 931
Ramiro II c. 931–950
Ordoño III 950–955
Sancho I 955–958
Ordoño IV 958–960
Sancho I (2nd time) 960–966
Ramiro III 967–982
Bermudo II 982–999
Alfonso V 999–1028
Bermudo III 1028–37

Leon and Castile
Ferdinand I (Fernando)
(Kingdom divided between three sons) 1039–65

Leon
Alfonso VI 1065–72

Castile
Sancho II 1065–72

Galicia
Garcia II 1065–71

Castile and Leon (including Galicia)
Sancho II 1072
Alfonso VI (restored) 1072–1109
Urraca (ruled with husband, Alfonso I of Aragon) 1109–26
Alfonso VII
(Kingdom divided between two sons) 1126–57

Leon
Ferdinand II (Fernando) 1157–88
Alfonso IX 1188–1230

Castile
Sancho III 1157–58
Alfonso VIII 1158–1214
Henry I (Enrique) 1214–17
Ferdinand III 1217–52

Castile (including Leon)
Alfonso X 1252–84
Sancho IV 1284–96
Ferdinand IV (Fernando) 1296–1312
Alfonso XI 1312–50
Peter I (Pedro) 1350–66
Henry II (Enrique) 1366–67
Peter I (2nd time) 1367–69
Henry II (2nd time) 1369–79
John I (Juan) 1379–90
Henry III (Enrique) 1390–1406
John II (Juan) 1406–54
Henry IV (Enrique) 1454–74
Isabella I and Ferdinand V (Ferdinand II of Aragon) (Isabel and Fernando) 1474–1504

Isabelline style: Named after Queen Isabella of Castile, Spanish style of architecture noted for its extraordinary flair and Flamboyant Gothic elements; often called Hispano-Flemish as being more accurate and to avoid confusion with Spain’s Queen Isabella II.

Isabellino style: Named after Queen Isabella of Castile, Spanish style of architecture noted for its extraordinary flair and Flamboyant Gothic elements; often called Hispano-Flemish as being more accurate and to avoid confusion with Spain’s Queen Isabella II.

Joan and Philip I (Juana and Felipe) 1504–06
Ferdinand V (2nd time) 1506–16

Aragon
Ramiro I 1035–63
Sancho I 1063–94
Peter I (Pedro) 1094–1104
Alfonso I 1104–34
Ramiro II 1134–37
Petronilla (ruled with husband, Ramón Berenguer IV of Barcelona) 1137–63
Alfonso II 1163–96
Peter II (Pedro) 1196–1213
James I (Jaime) 1213–76
Peter III (Pedro) 1276–85
Alfonso III 1285–91
James II (Jaime) 1291–1327
Alfonso IV 1327–36
Peter IV (Pedro) 1336–87
John I (Juan) 1387–95
Martin 1395–1412
Ferdinand I (Fernando) 1412–16
Alfonso V 1416–58
John II (Juan) 1458–79
Ferdinand II and Isabella I (1479–1504) (Fernando and Isabel) 1479–1516

Spain

House of Habsburg
Charles I (Carlos) 1516–56
Philip II (Felipe) 1556–98

Desoramentado: Austere style of Spanish-Renaissance architecture in the reign of King Philip II, of which Herrera’s Escorial near Madrid, is a good example.

Philip III (Felipe) 1598–1621
Philip IV (Felipe) 1621–65
Charles II (Carlos) 1665–1700

House of Bourbon (Borbón)
Philip V (Felipe) 1700–24
Louis (Luis) 1724
Philip V (2nd time) 1724–46
Ferdinand VI (Fernando) 1746–59
Charles III (Carlos) 1759–88
Charles IV (Carlos) 1788–1808
Ferdinand VII (Fernando) 1808

House of Bonaparte
Joseph (José) 1808–13

House of Bourbon (Borbón)
Ferdinand VII (2nd time) 1814–33
Isabella II (Isabel) 1833–68

Interregnum (1868–1870)

House of Savoy (1870-1874)
Amadeus I (Amadeo) 1870–73

Republic (1873–74)

House of Bourbon (Borbón) (1874-1931)
Alfonso XII 1874–85
Alfonso XIII 1886–1931

Republic (1931–1939)

Nationalist regime (1939-1975)
(Francisco Franco) 1939–75

House of Bourbon (Borbón) (1975-present)
Juan Carlos 1975–2014
Felipe VI 2014–

Also see Architecture index.