'''基督教世界'''<ref name="MWChristendom" /><ref>{{cite book | last = Marty | first = Martin | title = The Christian World: A Global History | url = https://books.google.com/?id=MoolUlqQdmAC | year = 2008 | publisher = Random House Publishing Group | isbn = 978-1-58836-684-9 }}</ref>有多種含義，既可以指世界範圍的[[基督徒]]；也可以指基督徒居多的國家<ref name="MWChristendom">See [http://www.merriam-webster.com/dictionary/Christendom Merriam-Webster.com : dictionary, "Christendom"] {{Wayback|url=http://www.merriam-webster.com/dictionary/Christendom |date=20170918135125 }}</ref>。自从[[羅馬帝國]]初期基督教自[[中東]][[沙姆地區]]傳入[[歐洲]]與[[北非]]之後，基督教始終存在分裂現象，形成了以[[羅馬]]為中心的[[西方基督教]]世界<ref>{{cite book |last=Chazan |first=Robert |year = 2006 |title=The Jews of Medieval Western Christendom: 1000-1500 |url = https://books.google.com/books?id=JxJQ_98I3R0C |location=Cambridge |publisher=Cambridge University Press |page=xi |isbn=9780521616645 |accessdate = 2018-01-26 }}</ref>和以[[君士坦丁堡]]為中心的[[東方基督教]]世界<ref>Encarta-encyclopedie Winkler Prins (1993–2002) s.v. "christendom. §1.3 Scheidingen". Microsoft Corporation/Het Spectrum.</ref>。在11世紀至13世紀，西方基督教世界是[[西方世界]]的中心。

==基督教的世界观==