- 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.
- http://haus-karoline-haslach.de porta nigra innenYayın zamanı: 4 saat önceThe Porta Nigra (Black Gate) in Trier in a beautiful summer day, Germany Stock Photo - Alamy. Fotos: So sieht die Porta Nigra in Trier im Innern im Detail aus.
- google.com.tr travel/entity/key/ChYI_be_ybL-……Porta Nigra, Trier Almanya'da bulunan büyük bir Roma şehir kapısı eseridir. Günümüzde Alplerin kuzeyinde yer alan Roma dönemine ait en büyük şehir giriş...
- livius.org articles/place/augusta-treverorum-…The Porta Nigra or "black gate", is the most famous building of Trier and has become its symbol. It belongs to the walls of Trier, which were erected during the...
- http://galenfrysinger.com germany_trier_porta_nigra.htmIn 1986, the Porta Nigra was designated a World Heritage Site, along with other Roman monuments in Trier and its surroundings.
- spottinghistory.com view/3785/porta-nigra/In 1986 the Porta Nigra was designated a World Heritage Site, along with other Roman monuments in Trier and its surroundings.
- werk5.com en/projects/porta-nigra/For 800 years, the Porta Nigra in Trier served as a double church. Until Napoleon demolished the church and the original Roman city gate was rebuilt.
- booked.net visit/attraction/germany/trier-18274/…Porta Nigra served as a main entrance to the Roman city of Trier, which was once one of the largest and most important cities in the Roman Empire.
- youtube.com watch4 bin görüntülemeYayınlandı30 May 2017
- en.advisor.travel poi/Porta-Nigra-3282In 1986, the Porta Nigra was designated a World Heritage Site, along with other Roman monuments in Trier and its surroundings.