How do I build military academies?

[Eco]

I want to build one in Jerusalem as CS, but the option doesnt appear. As you know Jerusalem already starts with a cathedral. And I dont have any other military academies.

[Fred Putz]

Some buildings are only available after a certain Year.

[Eco]

Ok, thanks. Any idea of the year, Im playing the late campaign.

[Fred Putz]

Pew - no clou exactly - i guess ~ 1300.

[Gorrrrrn]

requires: event_counter new_era_begins 1

event historic new_era_begins
date 200 (ie 1300)