The following is a timeline of selected events in the Najerilla valley and northern Spain, to provide a context for our research and to educate the public on the historical importance of the valley through time. The reader is invited to consult this map of the valley for help in locating specific places.

c. 37   Fineware production begins in and around Tritium Magallum
465   Supporters of Silvanus, bishop of Calagurris, write to Pope Hilary I. Among them are landowners from Libia (Herramélluri), Tritium Magallum (Tricio), and Varea (Agoncillo).
474   Roman control of the Ebro valley is officially lost and the region falls under Visigothic control.
early 6th century   Traditional date of foundation of monastery of San Millán by St. Aemilianus                                           
c. 573   Death of St. Aemilianus
c. 645   Bishop Braulio of Saragossa finishes his Life of St. Aemilianus.
c.714   The Ebro valley falls under Muslim control
918   First attack by Christians on Nájera, later repulsed by the Caliphate.
928   La Rioja Alta, including the valley of the Najerilla, falls under Navarrese control.
1002   The Muslim general Al-Mansur sacks San Millán de la
Cogolla on a raid into northern Spain.
1030   Reconstruction of San Millán de Suso is completed.
1035   García Sánchez III becomes king of Navarre. Known as García (“el de Nájera”), under his rule Nájera becomes a royal seat. First mention of the monastery of Santa María de Valvanera
1052   Monastery of Santa María la Real founded in Nájera
1063   Construction of San Millán de Yuso is completed; administrative center of the monastery is moved there.
1076   La Rioja Alta, including the Najerilla valley, falls under the control of the Kingdom of Castille.
1079   Monastery of Santa María la Real and all its properties are granted to the Order of Cluny by Alfonso VI.
1142   Peter the Venerable, abbot of Cluny, visits Cluniac possessions in Spain, including Santa María la Real, Nájera. It is likely here that Peter commissioned the first translation of the Qur’an into Latin.
c. 1230-50   Gonzálo de Berceo active, writes Life of St. Aemilianus, considered father of Spanish verse.
1304   Ferdinand (Fernando) IV of Castile confirms the fuero of Nájera.
1326   The villages of Terrero, Villagonzalo, Badarán and Villadolquit are abandoned to create a new planned settlement which survives as the modern town of Badarán (which may lie above the earlier village of that name).
1367   Battle of Nájera involving Peter (Pedro) I (“The Cruel”), backed by English forces under Edward, the Black Prince, against Henry (Enrique) of Trastamare, who had French support. Pedro and his English allies won the battle, though Pedro was not able to maintain the throne long after the English departed.
1454   Nájera is given the title “very noble and royal” (“muy noble y real”) by Henry (Enrique) IV of Castile.
1492   By decree of Ferdinand (Fernando) II of Aragón and Isabella of Castille, all Jews are required to leave Spain by July 31.
1520   Nájera joins the Revolt of the Comuneros against Hapsburg rule in Spain. Shortly thereafter, a loyalist army recaptures the city and its castle is destroyed to discourage further rebellion.
1835   Dispossession of monastic property in Spain; Santa María la Real is abandoned.