anchor: It was rediscovered in 1594 by an architect building an aqueduct, but excavation did not begin until 1748 under the Bourbons, making a tremendous impact on the rest of Europe.
positive: An architect discovered it at the end of the 1500s, but excavation did not occur until one hundred years later (approx.).
negative: It was rediscovered in 1454 by a merchant setting up shop.