Substantial remains survive (clockwise from the west) in the UK, The Netherlands, Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Turkey, Syria, Jordan, Israel, Iraq, Egypt, Libya, Tunisia, Algeria, and Morocco. Starting on the western coast of northern Britain, the frontier in Europe then ran along the rivers Rhine and Danube, looping round the Carpathian Mountains to the Black Sea. The eastern frontier, stretching from the Black Sea to the Red Sea and running through mountains, great river valleys and the desert. To the south, Rome’s protective cordon embraced Egypt and then ran along the northern edge of the Sahara Desert to the Atlantic shore in Morocco."
1 Remagen - Auxiliary fort - Fort of Rigomagus Visible remains of the principia, partly preserved and visible in the museum
2 Königswinter - Stone quarry - Area of rock stones with roman tool mark Tool marks preserved and visible
3 Bad Münstereifel - Lime kilns - Lime kilns of the 30th legion Ulpia victrix with working rooms Visible remains of lime kilns with information centre
4 Bonn - camps - walls of 11 manœuvre camps in the southern part of the Kottenforst preserved and visible remains of the earthen walls
5 Bonn - Legionary fortress - Legionary fortress of Bonna 85% of the area fortress still preserved in the inner city of Bonn; layout of the fortress preserved in modern road network and spatial development
6 Alfter and Bornheim - camps - walls of 11 manœuvre camps in the northern part of the Kottenforst preserved and visible remains of the earthen walls
7 Köln - fleet base - fort of the Rhine fleet Classis Germanica Remains not visible, partly overbuilt
8 Köln - Praetorium - Headquarter of the Lower German Army Remains preserved and visible
9 Köln - Late roman fortress - Late roman fortress of Divitia Remains preserved and visible
10 Dormagen - Auxiliary fort Fort of Durnomagus Remains preserved and visible in the cellar of the parsonage of St. Michael
11 Monheim - Auxiliary fort Late roman fort of Haus Bürgel Remains preserved and visible, integrated in the medieval castle
12 Neuss - Fortlet Fortlet and watchtower Reckberg Remains not visible, preserved in forest area, ex situ reconstruction of watchtower
13 Neuss - Legionary fortress Legionary fortress (and later cavalry fort) of Novaesium Remains not visible, layout of the fortress preserved in modern road network
14 Krefeld - Auxiliary fort Auxiliary fort of Gelduba Remains not visible, part of the front side destroyed, not overbuilt
15 Duisburg - Fortlet Fortlet Werthausen Remains not visible, partly overbuilt
16 Moers - Auxiliary fort Auxiliary fort of Asciburgium Remains not visible, partly overbuilt
17 Alpen - Camp Marching camp Boenninghardt Remains not visible, small area overbuilt
18 Alpen - Camp Marching camp Drüpt Remains not visible, small area overbuilt
19 Xanten - Legionary fortress Legionary fortress Vetera I, canabae, amphitheatre Amphitheatre visible, fortress not overbuilt
20 Wesel - Camps 4 manoeuvre camps of Flürener Feld preserved and visible remains of the earthen walls
21 Uedem - Camps 13 manoeuvre camps of Uedem-Hochwald preserved and visible remains of the earthen walls
22 Kalkar - Camp Vexillation camp of Kalkar-Monreberg Remains not visible, small area overbuilt
23 Kalkar - Auxiliary fort Auxiliary fort, vicus, limes road and cemeteries of Burginatium Remains not visible on the surface, not overbuilt.
24 Kalkar - Sanctuary Sanctuary of the Germanic war goddess Vagdavercustis, Kalkar-Kalkarberg Remains not visible, not overbuilt
25 Bedburg-Hau Auxiliary fort Auxiliary fort and vicus of Till-Steincheshof Remains not visible, small area overbuilt
26 Bedburg-Hau - Camp 2 marching camps of Till-Kapitelshof Remains not visible, small area overbuilt
27 Bedburg-Hau - Auxiliary fort - Auxiliary fort of Qualburg-Quadriburgium Remains not visible, partly overbuilt
Source: UNESCO World Heritage Tentative List
Postcard 1 - Nuess
Along the Rhine River, at Neuss, a reconstructed fortified Roman tower. Thanks to Marcel of Germany.
Postcard 2 - XantenIllustration of Roman site of Colonia Ulpia Traiana at Xanten Archaelogical Park Museum in Xanten, Wesel near the Dutch border. Thanks to Marcel of Germany. Postmarked on July 13, 2020 with Covid-19 special cancellation "GEMEINSAM GEGEN CORONA" (Together Against Corona) and arrived in July 28, 2020.