What is the significance of the upside-down cross in relation to the Pope's authority and symbolism within the Catholic Church?

The upside-down cross is often associated with Saint Peter, who was crucified upside down as a sign of humility. In the Catholic Church, the Pope is seen as the successor of Saint Peter and holds authority over the Church. The upside-down cross can symbolize the Pope's willingness to serve with humility and follow in the footsteps of Saint Peter.