The suppression of the Society of Jesus was imposed during his Dogate, to which the doge and a large part of the Genoese aristocracy were in favor.

For this reason Pier Francesco Grimaldi delayed the execution of this order, in agreement with the Jesuit archbishop of Genoa.

With pontifical permission he also restricted the right of immunity of churches for outlaws.

The dogate ended on 26 January 1775, and Grimaldi continued to work for the Republic.

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