A synod held in the diocese of Pistoia, Italy in 1786 under Bishop Scipio de Ricci, and under the patronage of the Grand Duke Leopold of Tuscany. It was an attempt to introduce Jansenism into Italy. The sessions and the decrees were marked with a Jansenistic and regalistic spirit. Many of those attending were extra-diocesans. Pope Pius VI commissioned four bishops to examine the decrees; the synod was condemned, and 85 of the propositions were characterized as erroneous and dangerous.