Adhemar negotiated with Alexius I Comnenus at Constantinople, reestablished at Nicaea some discipline among the crusaders, fought a crucial role at the Battle of Dorylaeum and was largely responsible for sustaining morale during the siege of Antioch through various religious rites including fasting and special observances of holy days. After the capture of the city in June 1098, and the subsequent siege led by Kerbogha, Adhemar organized a procession through the streets, and had the gates locked so that the Crusaders, many of whom had begun to panic, would be unable to desert the city. He was extremely skeptical of Peter Bartholomew's discovery in Antioch of the Holy Lance, especially because he knew such a relic already existed in Constantinople; however, he was willing to let the Crusade