On the other hand, The Pope Gregorius VII had sensitively perceived the results of the entrance of Turks into Anatolia pursuant to the Manzikert victory in respect of Christianity. Therefore, the Pole wrote a letter to the Byzantine emperor on the date of 9th July 1073. Within this letter, he stated that it was the right time for the integration of the Orthodox and Catholic churches. Upon the consent of the empire, he published his famous letters dated 2nd February and 1st March 1074 addressing to all Christians. Accordingly, Gregorius had explained the dangerous advance of Turks in his invitation that was considered as the first alarm of the Crusades. In these letters, he alleged with a severe language that the Muslims were "slaughtering the Christians just like the herds of sheep", and he declared the necessity for the support and help to the Greek empire against Turks in order to save their religious brothers. However, this alarm did not create the desired effect because of a conflict between the Pope and the Roman-German emperor, Henri IV.