Which person was criticized for selling indulgences to raise money to build st. peter's basilica in rome?

The answer is  Pope Leo X

Pope Leo X was excessively granting indulgences , this was the main fund rising for the building of St. Peter's Basilica . At that time Marthin Luther questioned behalf on raising funds for the reconstruction of St. Peters Basilica he provoked the reaction of other reformists . They manifested against the Selling of Indulgences in Luther's famous theses. This conduct was seen as scandalous by the adepts of Reformation, who  saw this as the purchase and commercialization of salvation. Martin Luther  refers to this practices stating " As soon as a coin in the coffer rings, a soul from purgatory springs".

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