The Henry VI Trilogy refers to a series of three plays written by William Shakespeare, namely 'Henry VI, Part 1', 'Henry VI, Part 2', and 'Henry VI, Part 3'. These plays chronicle the tumultuous events during the reign of King Henry VI of England, focusing on the power struggles and political conflicts that ultimately lead to the Wars of the Roses. They serve as a critical exploration of themes such as legitimacy, power, and the nature of kingship.