What did Martin Luther's 95 Theses primarily dispute?

Martin Luther's 95 Theses primarily disputed the selling of indulgences, which was a practice in the Catholic Church where people could pay money to receive pardons for their sins or to reduce their time in purgatory. Luther argued that this practice corrupted the true essence of Christian faith, which should emphasize repentance and faith rather than financial transactions for salvation. He believed that salvation came through faith alone, not through works or payments to the Church. The Theses, which were posted in 1517, sparked significant theological discussions and were instrumental in the Protestant Reformation, leading many to question the practices of the Church and the nature of its authority over salvation. This focus on indulgences was a key factor in drawing attention to broader issues of Church corruption and the need for reform.