[Wrana]

Well, you may be certain, but still "Conquerors of Sea" are clearly of the Henry the Seafarer's age, not Dark Ages at all. Inquisition, even earliest, can be seen only from 12th century (and Spanish one is known from 16th century). Pikemen began to be used in Europe in 16th century, and full plate is the armor of the same age. Vlad Tepesh lived in 17th century... Manchurian conquest of China is also 17th century...
Of course, Pythium LA is modeled after late Roman Empire, not late Byzantium. But if you want to use it as base for time-placement it would be even before Dark Ages start - the same goes with LA Arcoscehales (Hellinistic kingdoms) or LA Gath. I'm afraid there are no single nation in LA which would be based on Dark Ages... :P