I’ve encountered this model in four places. At first I saw it as just a pillar with some geometric carvings. But I’ve come to see it as a face, which somehow makes me think of a stereotypical robot. The particular example below is only two blocks from our flat, and has grown a crown of thorns thanks to the neighbor’s rose bush. The others in the gallery give you a clearer look at the carvings.
David Kotz 
after looking at the 4 pictures, I think these are art deco designs and not robots.
>