- spottinghistory.com view/3785/porta-nigra/In Roman times, the Porta Nigra was part of a system of four city gates, one of which stood at each side of the roughly rectangular Roman city.
- historyhit.com locations/porta-nigra/Porta Nigra, translated as the “Black Gate” is a magnificently well-preserved second century Roman gate in Trier, Germany.
- atlasobscura.com places/porta-nigraBuilt in grey sandstone just before the year 200, Trier’s Porta Nigra represents the last bastion of the Roman Empire’s presence north of the Alps.
- buyukansiklopedi.com Porta_Nigra2024 hakkında güncel bilgilerle Porta Nigra hakkında bilmediğiniz her şey. Porta Nigra'nun tanımı ve terimi.
- bega.com en/references/porta-nigra-trier/The Romans built the Porta Nigra from more than 7000 stone blocks in 170 AD. ... Today, the Porta Nigra is home to the Roman city’s central information centre.
- trier-info.de en/places-of-interest/porta-nigraWhen the Romans laid the foundation stone for the Porta Nigra in AD 170, they would never have imagined how successful it would be.
- booking.com hotel/de/porta-nigra.tr.htmlGood breakfast with fresh rolls. The hotel has a great location only 10 minutes walk from the station and right next to the historic Porta Nigra.”
- itinari.com location/porta-nigraDiscover the Magnificent Porta Nigra in Trier: A Roman Marvel. Trier, a charming city in Germany, is home to a remarkable historical treasure - the Porta Nigra.
- tripadvisor.co.uk Attraction_Review-g187394-…Though the plaza is busy, the inside of the Porta Nigra is not. There are four levels accessed by a spiral staircase only (no elevator).