One of the iconic moments in English history, the trial and execution of King Charles I has yet to be studied in-depth from a contemporary legal perspective. Professor Ian Ward brings his considerable legal and historical acumen to bear on the particular constitutional issues raised by the regicide of Charles, and not only analyses the unfolding of events and their immediate historical context, but also draws out their wider importance and legacy for the generations of historians, politicians, and writers over the ensuing three and a half centuries. This is a book about constitutional history and thought, but also about the writing of constitutional history and thought and the forms they have taken -whether as scholarship, polemics, or literary experiments - in collective British memory. Chapters range from the events leading up to and through the trial and execution of Charles; to their theatricality, legality, and constitutionality; to the political writings such as Milton's Tenure of Kings and Hobbes' Leviathan that followed; and finally trace the various subsequent histories and trials of Charles I that presented him either as martyr, Tory or -- in the 18th and 19th centuries -- the Whig.