A short timeline of events:
William IX of Aquitaine (died February 10, 1126) is considered to be one of the earliest known troubadours by historians. Troubadour culture and Courtly Literature flourishes in Southern France.
Marie de Champagne, daughter of Eleanor of Aquitaine, commissions the romance Knight of the Cart/Lancelot by Chretien de Troyes, between 1175 to 1189. It is the earliest known depiction of the adulterous affair of Sir Lancelot and Queen Guinevere
Marie de Champagne is also purported to have commissioned Andreas Capellanus to pen the treatise De Amore, between 1185 to 1190.
The Synod of Verona is held on November 1184. Marriage is declared a sacrament in response to Catharic influence.
Marie de Champagne dies on March 11, 1198. Her mother, Eleanor, dies six years later on April 1, 1204
The Albigensian Crusade erupts in Southern France. from 1209 to 1229. Catharism is eradicated. Casualties range from two hundred thousand to over a million dead. Troubadour culture declines in the region.
The Lancelot-Grail Cycle or the Vulgate Cycle is composed between 1210 to 1235. The first three sections of the literary cycle are believed to be as follows: the Lancelot (c. 1210 to 1220), Queste del Saint Graal (c. 1220 to 1225) and Mort Artu (c. 1225 to 1230). The earliest iterations of Tristan en Prose/Prose Tristan are also believed to be composed around this period.
The Post-Vulgate Cycle, a combined revision of the Lancelot-Grail and the Prose Tristan with stronger pessimistic themes against secular and courtly chivalry, is composed from 1230 to 1240.








