Gate of Trajan
Located in present-day Bulgaria, approximately 50 kilometres from the capital city of Sofia, the mountain pass known as the Gate of Trajan (Bulgarian: Траянови врата) formed part of the Via Militaris, a Roman road constructed in the 1st century CE that connected the provinces of Thrace and Moesia Superior, and later linked the territories of the Eastern Roman Empire with the lands beyond its borders, commonly referred to as Barbaricum.
