Urban to launch the First Crusade aimed at aiding the Byzantine Empire and. 184 Holy Orders Main article: Holy orders in the Catholic Church Priests lay their hands on the ordinands during the rite of ordination. Retrieved 1 February 2017. 283285 Herbermann, Charles,. 224 Social services Main articles: Catholic Church and health care and Catholic education Saint Teresa of Calcutta advocated for the sick, the poor and the needy by practising the acts of corporal works of mercy. 416 Duffy (1997. These include churches that historically developed in Russia, Caucasus, the Balkans, North Eastern Africa, India and the Middle East. His 27-year pontificate was one of the longest in history. Retrieved " CCC, 102329, 104250". "The Other Catholics: A Short Guide to the Eastern Catholic Churches".