Prose Tristan

The Prose Tristan (French: [Roman de] Tristan en prose), also known as Tristan de Léonois, is a 13th-century Old French expanded adaptation of the Tristan and Iseult legend into a vast prose romance (although containing lyrical passages). It was the first work to fully integrate the Tristan narrative into the framework of the Arthurian legend, presenting Tristan as a top-tier member of the Round Table. The Prose Tristan was also the first major Arthurian prose cycle produced after the Vulgate Cycle, which had a particular influence on its later sections. Several distinct versions of the work exist, most notably the "short" and "long" versions.

The Prose Tristan was one of the most popular, widely copied, and influential works in medieval European literature. It consequently became the definitive version of the Tristan story in the late Middle Ages and significantly influenced the subsequent Arthurian works such as the Post-Vulgate Cycle and Le Morte d'Arthur. Its strong impact on the Arthurian legend included the introduction of popular characters such as Palamedes, Dinadan, and Lamorak.