In June 1135, Bernard of Clairvaux took a leading part in the Council of Pisa, asserting the claims of Pope Innocent II against those of Pope Anacletus II, who had been elected pope in 1130 with Norman support, but was not recognised outside Rome.
I juni 1135 spillede Bernard af Clairvaux en ledende rolle i rådet i Pisa, hvor pave Innocens 2. hævdede sig fra anklager mod pave Anacletus 2., der var blevet valgt som pave i 1130 med normannisk støtte, men var ikke blevet anerkendt uden for Rom.