Thematic Photographic - Round

This week at Thematic Photographic, Carmi asks us to explore the theme ROUND. What is round? is it a circle, a sphere, a mound? Is it an open ring, an orbit, an arc?

Here's something I can't identify. I was walking down Main Street in Los Angeles' downtown. On top of a 19th century building at the corner of Main and 5th, I saw this.

I had to walk across the street, and move all around the intersection to get a good picture of it.

What is it? It looks like a windvane, or a sundial. It is mounted on the roof of an old building that used to be a market, but now houses a homeless services agency.

In Downtown Los Angeles, 5th Street east of Broadway has become known as "The Nickel" - partly for its number, but also because it was a place where you could get a nickel bag of anything.

Who created and placed this sundial here in The Nickel? I've searched for answers. There's nothing I can find, not on the city's Cultural Affairs site, not on the Conservancy site, not on any arts organization site.

But here it is - an orb, an open O, a sundial - ROUND - hidden in plain sight from all except those who look up to the sky.

If any of you Los Angeles folks know what this art piece is - tell me.