Mark Antony's love for Cleopatra led to war between Rome and Egypt; Emperor Xuanzang of Tang relinquished the Mandate of Heaven for Yang Guifei; and the English Reformation was borne out of Henry VIII's passion for Anne Boleyn. Over the centuries since, these great loves - and many others - have been celebrated, recorded, and memorialized to stand alongside the annals of war, peace, and politics that have moulded today's world.