How did the Crusades affect the Pope's power and authority?

How did the Crusades affect the Pope's power/authority, during and after the Crusades? ### [The Crusades](http://en.wikipedia.org/wiki/Crusades) , from Wikipedia >The Crusades were a series of religiously sanctioned military campaigns, called by the Pope and with the main goal of restoring Christian control of the Holy Land. The crusaders came from all over western Europe. The main series of Crusades occurred between 1095 and 1291; historians have given them numbers, later unnumbered crusades were also taken up for a variety of reasons.