Informations from the official tourism website:
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"For the newly arrived guest, the Porta Nigra is the best place to begin a tour of Trier. The gate dates back to a time (about A.D. 180) when the Romans often erected public buildings of huge stone blocks (here, the biggest weigh up to six metric tons).
The slabs were cut by bronze saws powered by mill wheels (some cutting traces are still visible) and put together without mortar. Instead, two stones each were held together horizontally by iron clamps whose bent ends were embedded in corresponding holes by molten lead. One clamp is visible inside the gate near the eastern spiral staircase; rust traces can be seen in many holes on the outside because in the Middle Ages people chiseled these holes to retrieve the metal for recycling.
The stone blocks were spared a recycling because of the Greek monk Simeon, who had himself walled up in the eastern tower as a hermit after 1028. After his death in 1034/5, he was buried inside the gate and made a saint. In his honor, two churches were built into the gate (torn down 1804-1819). The upper story of the eastern tower was razed - the only real damage to the stone gate, whose name, »Black Gate,« is medieval and goes back to the black pollution patina on the gray sandstone.
Inside (fee), traces of the double church, Roman stone masons' marks, and date inscriptions are visible.
Gladiator Valerius im Amphitheater Trier
A Roman centurion will show you the Secrets of the Porta Nigra
A centurion – in the splendor of his parade armament – will abduct us into a time when Rome ruled the world – and the Emperor in Trier decided the fate of the Empire. Suddenly the audience is standing in the midst of that eventful time – and not just as passive observers!"
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Porta Nigra. (2018, January 13). In Wikipedia, The Free Encyclopedia. Retrieved 18:54, January 14, 2018, from (
visit link)
"The Porta Nigra (Latin for black gate) is a large Roman city gate in Trier, Germany. It is today the largest Roman city gate north of the Alps. It is designated as part of the Roman Monuments, Cathedral of St. Peter and Church of Our Lady in Trier UNESCO World Heritage Site.
The name Porta Nigra originated in the Middle Ages due to the darkened colour of its stone; the original Roman name has not been preserved. Locals commonly refer to the Porta Nigra simply as Porta."