"Ancient Regime" is a landmark work of the famous French historian Hippolyte Tain, which reveals the political and social system of ancient France. The author explores the social landscape, institutions and political structures from the period before the French Revolution. The book delves deep into the history of France, revealing the factors that led to the fall of the old regime and the birth of a new era. "Ancient Regime" is not only a historical work, but also an increasingly important document that helps to understand the roots of events in the past that determined the modern world.