This book explores the political ideas, cultural practices and geostrategic actions that gave rise to transatlantic monarchism in Europe and the Americas. During the age of revolutions (1776-1830), a wave of republicanism swept the Atlantic world. Its most apparent achievement was the creation of several republican states in the Americas and the emergence of republican movements in Europe. However, the revolutionary modernity that most republican projects proposed soon confronted the opposition of a revived monarchist creed, whose cultivators elaborated a geopolitical horizon of their own for the Euro-American world. Many intellectuals and policy-makers of the period designed projects to consolidate existing monarchies in Western Europe, the Caribbean and the American continent and restore thrones in the countries of Latin America. To this end, they imagined an alternative modernity in which Europe and the Americas would be linked by the political culture of monarchism, whether in its constitutional or illiberal version. Rodrigo Escribano Roca is Marie Curie Fellow in the Department of International and Global History at CSIC, and Researcher in the Center for American Studies at Universidad Adolfo Ibáñez, Chile. In September 2025 he will join the Department of Contemporary History of the Universidad Nacional de Educación a Distancia as a Ramón y Cajal Researcher and Professor. He is the Head Researcher of the Fondecyt Project Nº 1240232, 'The political culture of post-imperial intervention: Spain and the South American republics of the Pacific'. His Marie Curie Action Project 101148590 - POST-EMPIRE aims to elaborate a political theory of post-imperial conflicts.< Rebeca Viñuela Pérez is Associate Professor in the Department of History and Philosophy at the University of Alcalá, Spain. She coordinates the area of History and Prospects at the University Institute for Research in Latin American Studies. Her research focuses on the political cultures of monarchism in the transatlantic world. She has studied the political ideas of the first Mexican empire and the Americanist projects of global monarchies proposed in the Spanish courts during the Liberal Triennium (1820-1823).