Macklin’s Henry the VII (1746) has received little critical attention. This chapter reads the play as part of a tradition of Irish history plays that were influenced by Joseph Addison’s Cato (1713). Addison’s themes of personal self-sacrifice, love of country and resistance to tyranny proved inspirational for Irish dramatists in the wake of the Declaratory Act (1720) as can be seen in William Philips’s Hibernia Freed (1722) and Henry Brooke’s Gustavus Vasa (1739). History plays then might offer an alternative genealogy of eighteenth-century Irish theatre which is often focused on comedies.