How do artificial intelligence and disinformation challenge the rule of law in Europe? This book provides a critical examination of the legal and democratic implications of AI, offering a constitutional roadmap to uphold fundamental rights in the digital age. The book investigates the transformative impact of AI on the principles underpinning European constitutional law, with particular emphasis on the rule of law, human dignity, and democratic governance. It examines how AI-driven automation and autonomy disrupt traditional legal safeguards, posing challenges to accountability, transparency, and pluralism. Through an in-depth analysis of European regulatory frameworks, including the AI Act and the Digital Services Act, and key constitutional principles, the book addresses issues such as algorithmic bias, informational pluralism, and the governance of disinformation. Drawing on case studies and cross-jurisdictional comparisons, it offers actionable strategies to adapt constitutional protections to the challenges of an AI-driven society. By focusing on the interaction between AI, disinformation, and European democratic values, the book is a vital resource for understanding and addressing the threats posed to the rule of law in a rapidly evolving digital landscape.