The Middle Ages are preceded by Ancient Times and followed by the Industrial Ages in Civilization III. Out of 22 technologies in the Middle Ages, only 14 technologies need to be discovered to advance into the next era.
In order to advance to the next era, all technologies must be discovered, except for those marked with the "No" symbol, specifically Chivalry, Printing Press, Free Artistry, Democracy, Music Theory, Economics, Navigation, and Military Tradition.
|Civilization III Eras|
|Ancient Times • Middle Ages • Industrial Ages • Modern Times|