Old Rule, Page 16, 3.2 Objective Cities: “Each Objective City is worth one Victory Point. These cities are: Berlin, Tokyo, Rome, London, Calcutta, Sydney, Paris, Washington, D.C., Nanking, and Moscow.”
Current Rule, Page 16, 3.2 Victory Points Earned Through Capture of Objective Cities: “The following cities are Objective Cities: Berlin, Tokyo, Rome, London, Calcutta, Sydney, Paris, Washington, D.C., Nanking, and Moscow. Capturing an objective city from an opposing player scores one Victory Point for each Objective City Captured.”
Victory Points are only scored at the end of the game, so if Germany captures Paris, but subsequently loses it, they won’t score a point for it.