'''Christendom''', is the geographical part of the [[world]] in which [[Christianity]] prevails or which is governed principally under Christian institutions; it can also mean Christianity as an organized [[religion]]. "[[St. Augustine]]'s books were read throughout Christendom."
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'''Christendom''' is the geographical part of the [[world]] in which [[Christianity]] prevails or which is governed principally under Christian institutions. It can also mean Christianity as an organized [[religion]].<ref>http://www.merriam-webster.com/dictionary/Christendom</ref>