Just a quick one:
That's a simultaneous Conquest (by eliminating Louis, my last opponent), Wonder (by building and stealing wonders of the world), territory (by owning three quarters of the map) and score (by having the highest score) victories.
Achieved on an islands map, by settling onto one opponent's island very early, and knocking out two of my three opponents' shipyards. I then prioritised getting an army in place, got a tech advantage over Egypt, and knocked them out. Then I built a wonder (Versailles), which bumped the other two AIs into 'must prevent wonder victory' mode and never let them catch up my tech lead. Then I killed them. ^_^