Austria - Germany - Slovakia - Frontiers of the Roman Empire – The Danube Limes (Western Segment)

"It covers almost 600km of the whole Roman Empire’s Danube frontier. The property formed part of the much large frontier of the Roman Empire that encircled the Mediterranean Sea. The Danube Limes (Western Segment) reflects the specificities of this part of the Roman Frontier through the selection of sites that represent key elements from road, legionary fortresses and their associated settlements to small forts and temporary camps, and the way these structures relate to local topography"

Source: UNESCO World Heritage

Postcard 1 - Germany
Roman wall ruins of Passau, Lower Bavaria, Germany. Thanks to Anne of Passau, Germany.

Postcard 2 - Austria
Map of Roman ruins of Vindobona, Austria. It is a new UNESCO World Heritage site. Nice embroidery stamp of a mini FFP2/N95 Face Mask. Thanks so much to Uli of Austria. Postmarked August 9, 2021 WIEN and arrived in Penang on October 28, 2021.

Postcard 3 - Slovakia
Relics of Roman Castle in Gerulata, Slovaka. The ruins of Gerulata is inscribed as a UNESCO World Heritage in 2021. Thanks to Misino of Bratislava, Slovakia. Nice matching stamps of Gerulata used.