What did the money for indulgences used for?

The money collected from indulgences was primarily used to fund various church projects, including the construction of St. Peter's Basilica in Rome. It also supported the maintenance of church operations and the clergy. Additionally, the sale of indulgences was often justified as a means to alleviate the financial burdens of the church and to support charitable activities. However, the practice became controversial, leading to widespread criticism and contributing to the Protestant Reformation.