Upper level archway - 'Kaiserthermen' Imperial Roman baths, c350 CE - Trier, Germany..

Roman 'opus caementicium' construction styles: Opus quadratum: regular ashlar courses; Opus latericium: regular brick courses; Opus vittatum: square blocks separated by brick bands.

en.wikipedia.org/wiki/Roman_brick

en.wikipedia.org/wiki/Roman_concrete

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UNESCO World Heritage Site

whc.unesco.org/en/list/367/

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Nikon AF Nikkor 28-105mm 1:3.5-4.5D

 

DSC_3087 Anx2 1400h Q90 0.5k-1.5k f25 f50

Done