Most write-ups are from Trier Tourismus und Marketing GmbH
The Trier Roman Amphitheatre may have been constructed as early as the first century AD, but was certainly in use by the second century.
Able to hold around 20,000 spectators, Trier Roman Amphitheatre would have been the site of fierce gladiatorial battles, also involving animals. In fact, tunnels have been found under Trier Roman Amphitheatre which would have been used to house these animals together with unfortunate prisoners of the Roman Empire.
The Imperial Baths of Trier, known in German as Kaiserthermen, are the beautifully preserved ruins of a Roman public bath complex constructed in the fourth century AD.
Considered to be the largest Roman baths outside of Rome, the remains of the Imperial Baths of Trier are centrally located within the city and are a fantastic site, with many of their walls standing and even the option to explore their underground tunnels.
Trier old city wall - I didn't bring my running gear, this would have made for a great route.
The Electoral Palace directly next to the Basilika is considered one of the most beautiful rococo palaces in the world.
In 1615, Elector Lothar von Metternich had the present north and east wings built; the west and south wings were constructed under Philipp Christoph von Soetern. The structure was finally finished by Carl Caspar von der Leyen.
The Porta Nigra 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 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.
A view of old Trier next to the Porta Nigra
Trier Cathedral [Dom], the oldest bishop’s church in Germany, stands today in Trier’s center above a former palace from the era of the Roman Emperor Constantine the Great. The palace complex was supplanted in the 4th century by the largest Christian church complex from ancient times. It consisted of four basilicas joined by a large baptistry; the complex covered an area extending to the present Main Market. Tours under the building of the Cathedral Information show the remains of the first Early Christian assembly room north of the Alps from the late 3rd century and the remains of the first basilica.
Today's Cathedral still contains a Roman central section with the original walls rising up to a height of 26 m (86 ft). The huge fragment of a granite column next to the entrance to the Cathedral is another indication of the Roman origin of the building. After destructions in the 5th and 9th centuries, the remaining nucleus was enlarged by Romanesque additions - today, the Cathedral, with its three crypts, its cloister, Cathedral Treasury, and Holy Robe Chapel, displays architecture and artwork from more than 1650 years. - The Dom was holding Good Friday services, so I couldn't go inside. It's so large, that this is the only photo [from the top of the Porta Nigra] where I could get all of it.
The so-called Basilika, Constantine's throne room, is the largest surviving single-room structure from Roman times. The Romans wanted the architecture to express the magnificence and might of the emperor.
This depth is magnified by an optical illusion - both the windows of the apse as well as the niches underneath become progressively smaller towards the middle, thus enhancing the impression of length.
Later on, the archbishop used it as his administrative center and it was enlarged by three palace wings after 1614. Since the middle of the 19th century, it has been used as the first and oldest Protestant church in Catholic Trier with a splendid organ answered by a seven-second echo.
I'm also a WWII nerd - The Hochbunker [air raid shelter], built in 1942. Like others of it's species, these have proven too costly to demolish after the war, and many have found other uses. This one is not open to the public and serves mainly as storage for the city.
The Barbara Baths (fee) were built in the second century as the then largest Roman baths. Although only one third of the original facility has been excavated, a tour of the passageways takes a surprisingly long time.
The extensive ruins were used as a castle in the Middle Ages, then torn down and recycled as building material until the remains were used for constructing the Jesuit College in 1610.
Only the foundations and the subterranean service tunnels have survived, but the technical details of the sewer systems, the furnaces, the pools, and the heating system can be studied better than in the other two baths. - Currently closed to the public.
The Roman Bridge in Trier is the oldest bridge in Germany. The stone pilings of the Roman Bridge date from A.D. 144-152.
The pilings of the Roman Bridge from A.D. 144-152 (the arches and roadway are from the 18th century) are deeply embedded in the bedrock underneath the river gravel.
On March 2, 1945, General Patton's tanks captured the bridge so quickly that it was not blown up - the (empty) charge chambers are still visible from the up-river side of the bridge.