I just noticed that the Empire and Barbarians have e secondary headquarter. They are mentioned in the in-game encyclopedia but how can they be build? It says on a green build site. But clicking on such doesn't reveal it in the build menu.
Have they been deliberately removed?
Also the name for barbarians' currently is just Headquarter.
descname = pgettext("barbarians_building", "Headquarters"),
Shouldn't it be "Headquarters Interim" to not confuse it with the regular one?