Ptuj ist the oldest Slovenian town, a great military and commercial centre two thousand years ago, when the town was known as Poetovia. It also thrived in the Middle Ages, since it was a centre for trade from north to south, east to west. This only changed when railway was built through Maribor. Nowadays Ptuj is a great wine centre and a place of great folk festivals. The Roman armies left a significant reminder of their presence - the Mithra temples.