Since apparently we won't see that modding manual before the 'Second Coming' - is there anyone here who knows what are all the possible triggers for buildings? Or are they really limited to technology?
Trigger is in province scope, you need to change that to title scope to check if certain building is there.
really? is that possible in building.txt or only through events?
Yes, IIRC. It has been a while since I tested it.
However, why would you use trigger for buildings instead of prerequisites?