Luxembourg and German Survey Markers

On my recent travels I've done my usual and, nose down to pavement, have picked up a few little beauties as I've walked around.

The first seven are from random pavements in Luxembourg.

And a height marker in Luxembourg City.

Just across the border in Trier, Germany, there is more of the same. 

And then when I was down by the Mousel, on the Luxembourg side, I found not only a marker but a whole trig pillar!