Inside Moscow's majestic Cathedral of Christ the Saviour

National Geographic's Sergey Gordeev explains the history of the world's tallest Christian Orthodox church.

FIFA Men's World Cup A-League Men CONCACAF Champions Cup English Premier League Brazil Serie A African Nations Cup FIFA Club World Cup Canadian Premier League CONCACAF Olympic Qualifying CONCACAF Women's Championship Copa América CONCACAF U-20 Championship FIFA U-17 World Cup UEFA Europa League International Friendlies FIFA U-20 World Cup Euro Qualifying WCQ - CONMEBOL UEFA Nations League Russian Premier League Swiss Super League Irish Premier Division Chilean Primera Division Greek Super League Spain Supercopa de Espana Colombian Primera A Copa Diego Armando Maradona Women's Olympic Tournament Men's Olympic Tournament Paraguayan Primera Division WCQ - Intercontinental Playoff SheBelieves Cup United Soccer League Uruguayan Primera Division CONCACAF Nations League UEFA Conference League CONCACAF U-17 Championship UEFA Super Cup WCQ - UEFA Copa Sudamericana WCQ - CONCACAF Confederations Cup WCQ - CAF Dutch Johan Cruyff Shield Belgian Super Cup UAE Super Cup International Champions Cup France Trophee des Champions German DFL-Supercup Community Shield Argentina Supercopa Recopa Sudamericana Italy Supercoppa Italiana Copa Libertadores WCQ - OFC WCQ - AFC Algarve Cup MLS UEFA Euro UEFA Champions League Bundesliga Scottish Premier League English League Two NWSL Eredivisie Turkish Super Lig Argentina Primera Division Jupiler League English Championship English League One Primeira Liga