When the building is selected, a timer shows how long before the bonus Gold can be collected again.
A strong choice for every nation, Notre Dame can conserve an extreme amount of resources for the player. However, it doesn't offer much else defensively or offensively. If you seek a strong offensive or defensive option, this wonder is not for you.
This wonder can save you up to 10 million in resources (provided that you completed this wonder prior to any Blacksmith research and Library techs acquired in the Classical Age). As of the Oil Boom update, it can save you much more Oil.