Contrary to what is sometimes alleged, no eyewitness source refers to Crusaders killing Eastern Christians in Jerusalem, and early Eastern Christian sources (Matthew of Edessa, Anna Comnena, Michael the Syrian, etc.) make no such allegation about the Crusaders in Jerusalem.
The Gesta Francorum claims that on Wednesday August 9, two and a half weeks after the siege, Peter the Hermit encouraged all the "Greek and Latin priests and clerics" to make a thanksgiving procession to the Church of the Holy Sepulchre [REF].