Obedientia Civium Felicitas Urbis, Happy is the city where citizens obey.
You can see the city motto on most lampposts in the capital. Walking into the library of NUI Maynooth with my hawk-eyed da, he spotted two Dublin city corporation lampost on the campus.
More Dubliners lost to North Kildare then!
Click on the book for more.
Click on the book for more.
Donal
Ciarán
Sam
Come Here To Me! 
Is there a full photo of that lamp post? It might help to identify it.