What is the title of Alfred, Lord Tennyson's Arthurian poem sequence containing “The Holy Grail”?

Alfred, Lord Tennyson’s Arthurian poem sequence containing “The Holy Grail” is titled Idylls of the King. The sequence retells the rise and collapse of King Arthur’s realm in Victorian English verse.

Tennyson published the idylls over several decades, beginning with “The Epic” in 1859 and completing the sequence in 1885. “The Holy Grail” is one of the later idylls and describes the disruptive effect of the quest on Arthur’s fellowship of knights.

The poem reflects Victorian concerns about duty, faith, temptation, and social order. It is not a single medieval source but a modern literary reworking of Arthurian material. Tennyson drew on earlier writers, including Thomas Malory, while shaping the legends for a 19th-century audience.