On 31 October 1517, the German monk Martin Luther penned his Ninety-Five Theses, a document that would fundamentally alter the course of European history. By challenging the Catholic Church's practice of selling indulgences—payments made to reduce the punishment for sins—Luther ignited a firestorm of controversy that questioned the established authority of the papacy. His arguments were rooted in a desire for theological debate regarding the nature of repentance, the source of religious authority, and the path to salvation.

The publication of these theses is widely recognised as the symbolic start of the Protestant Reformation. What began as an academic protest quickly evolved into a widespread movement that transcended religious boundaries, profoundly influencing the political landscape and educational structures of the continent. As the ideas spread, they fostered a climate of critical inquiry that challenged the hegemony of the Church and encouraged the rise of individual interpretation of scripture.

The impact of this event was both immediate and enduring, leading to deep divisions within Western Christianity. The key themes addressed in the document included:

• The moral implications of selling indulgences for the remission of sins.
• The necessity of genuine internal repentance over external financial transactions.
• The limitations of papal authority in matters of divine grace.
• The fundamental importance of faith as the primary means of salvation.

By questioning long-standing ecclesiastical traditions, Luther’s work provided the intellectual foundation for the emergence of various Protestant denominations. This shift not only reshaped the spiritual lives of millions but also contributed to