The structure of Orthodox churches with their central cupola symbolises the presence of heaven on earth and the idea of the divinisation of man.
Christ the Saviour Cathedral in Moscow, colour photograph, 2007, photographer: Voytek S; source: Wikimedia Commons, http://commons.wikimedia.org/wiki/File:Katedra_Chrystusa_Zbawiciela_w_Moskwie_2.jpg?uselang=de.