310 AD space win with Gilgamesh on a huge, round chieftain map with state property. This compares to a 320 AD space win with Pericles on a huge flat chieftain map with 3 corporations. Railroad was teched followed by the trek to Fusion and then to Rocketry. This allowed for workers to be commissioned to lay tracks from the capitol to the Ironworks city so that the engineer could get there in time to 1-turn the Ironworks enabling the Apollo Program to be 1-turn chopped. The ship was then 1-turn built and launched soon afterwards.
But Gilgamesh's wonder fail gold approach was slow compared to Darius's brute force. In about 20 turns Darius can have 2 workers chop a courthouse, develop some food, and lay down a cottage. With about a cottage per city each courthouse would be worth about 4 gold and each cottage would be worth another 4 gold. For a 50-city empire, that's saving 200 gold per turn while generating 200 gold per turn. Or about 20,000 gold in 50 turns. Resource-less, cheap courthouses seem better than fail gold which is a revenue source that can be tapped but expansion is so fast that it is hard to do. Mercantilism by 1750ish BC implies the ability to put more coins on soil via windmills. No wonder the Hagia Sophia is a top priority.