Flag and coat of arms of Transylvania

The flag and coat of arms of Transylvania were granted by Maria Theresa in 1765, when she established a Grand Principality within the Habsburg monarchy. While neither symbol has official status in present-day Romania, the coat of arms is marshalled within the national Romanian arms; it was also for decades a component of the Hungarian arms.

Source: Wikipedia — Flag and coat of arms of Transylvania (CC BY-SA 4.0)