Because my host's parents in law are older people, we had no chance to have a walk in Trier and see all the sightseeing places really close. Her father in law sits in a wheelchair and her mother in law needs a walker, so it is too difficult for them. Nevertheless we took the chance to take a look at the sightseeing places from a place called Petrisberg. It was a bit difficult to take photos, though, first my host didn't have her own camera, second we had the sun against us and third either I or the landscape was sharp and so we had to zoom in some parts to give you a closer view on some places.
Trier is the oldest city in Germany, founded in or before 16 BC on the banks of the Moselle. Trier lies in a valley between low vine-covered hills of ruddy sandstone in the west of the state of Rhineland-Palatinate, near the border with Luxembourg and within the important Mosel wine region.
The city is the oldest seat of a Christian bishop north of the Alps.
With an approximate population of 105,000 Trier is ranked fourth among the state's largest cities; after Mainz, Ludwigshafen, and Koblenz.
You can take a look at the link. My host says, that she loves Trier and that you should come and see it, if you get a chance to visit this part of Germany.
We will go and see St.Matthias in the late afternoon.
I'm really sorry, but we also had no chance to catch a short view to the most famous Porta Nigra, because you can't see it on the photo above - it is just too small as you can see on the zoomed in photo.