The British monarchy is one of the most durable institutions in the world. For almost a thousand years (with only one brief interlude) it has served as the formal head of the British state apparatus and has occupied its subjects' imaginations to a profound extent. Frank Prochaska takes a close look at the relationship between monarchy and its enemies since 1750. He considers the challenges that monarchy has faced and the reforms and reinventions they have forced on this apparently solid and timeless feature of the British constitution.