In the "History of Friedrich II of Prussia — Appendix," Thomas Carlyle delves deeper into the life and reign of Frederick II, providing a meticulous examination of the socio-political landscape of 18th-century Prussia. Carlyle's literary style is characterized by a rich, nuanced prose that weaves historical narrative with a philosophical reflection on the nature of power and governance. This appendix serves not only as a supplementary text but also as a critical lens through which to view the complexities of Frederick's character, his military strategies, and the impacts of his rule on European geopolitics. Carlyle's fervent narrative captures the tumultuous era, marked by the Enlightenment's cultural ascendance and the Enlightenment monarch's struggle for authority and legitimacy. Thomas Carlyle (1795-1881) was a Scottish essayist, historian, and philosopher renowned for his profound engagement with historical themes and figures. His admiration for Frederick II, often referred to as Frederick the Great, stems from Carlyle's interest in the interplay of genius and history. This work is a testament to Carlyle's belief in the importance of great individuals in shaping destiny, influenced by his wider philosophical inquiries into heroism and societal transformation. This appendix is invaluable for readers seeking a deeper understanding of Carlyle's historical analysis as well as the intricate details of Frederick II's life. Scholars, students, and history enthusiasts will find this work a profound exploration of leadership and the legacy of a pivotal figure in European history, encouraging them to reflect on the broader implications of governance and the nature of power.