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How did Julius II respond to the schismatic council called by his opponents?

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Medallion depicting Pope Julius II — Julius II Julius II, contemporary medallion; in the coin collection of the Vatican Library.

In response to a group of rebellious cardinals who defected to King Louis XII of France and summoned a schismatic council at Pisa, Pope Julius II took decisive action to defend papal authority.12

He responded by convoking the Fifth Lateran Council, which opened in May 1512 at the Lateran Palace in Rome. This council was specifically designed to nullify the efforts of the schismatic assembly and to counter the conciliar movement, which promoted the idea that a general church council held authority superior to that of the pope.321

The Fifth Lateran Council ultimately repudiated the declarations of the earlier Councils of Constance and Basel that had asserted the superiority of councils over the papacy. The schismatic council at Pisa eventually collapsed after losing the support of both the French king and the Holy Roman emperor.31