Where is Transylvania? Can You Find It in These Maps?

Below is a series of maps. Six different maps to be exact.  Some of them are bigger and some are smaller in terms of the territory they show.  Some of them are recent and some are older.  The question is not, where is Transylvania, but rather where is it on these maps?

I am sure it is simple to find Transylvania, at least for most people.  Others would have trouble depending upon which map they looked at and if they understood European history in general.  That is also why people publish books on Europe and Romania and of course publish books on Transylvania.