🇦🇹 Austria · Ancient city
Carnuntum
Carnuntum (from Ancient Greek Καρνοῦς (Carnous) according to Ptolemy) was a Roman legionary fortress (Latin: castra legionis) and headquarters of the Pannonian fleet from 50 AD.
🇸🇰 Slovakia · Ancient city
Nitra Castle and Martin's Hill – Princely Seat
Early Middle Ages (7th–12th c. Principality of Nitra; Great Moravian 833–907) · Principality of Nitra / Great Moravia (Pribina, Svatopluk)
Nitra Castle and Martin's Hill – Princely Seat in Nitra Region, Nitra city, Castle Hill and Martin's Hill, Slovakia is a Early Middle Ages (7th–12th c.