Reference
Exactly what Byzantines can train, build and research, by age.
Defensive civilization
•Buildings +10/20/30/40% HP in Dark/Feudal/Castle/Imperial Age
•Camel Riders, Skirmishers and Spearman-line cost -25%
•Town Watch, Town Patrol free
•Advancing to Imperial Age costs -33%
Team bonusMonks heal +100% faster
55 units · 29 buildings · 75 technologies. Each building carries what it trains and researches; upgrades sit under what they upgrade from.