The Imperial, Part 2

Stonework above the entrance to the old Imperial Hotel - 1894

I was at Java Man Coffee in downtown Portland last Thursday, sitting there, drinking my coffee and I notice this old stone archway across the street. I'm looking at this thing and I am wondering what I am seeing? Is that just rough cut stone, or random swirly stuff? I think it's carvings of plants. Awfully darn intricate. Makes me wonder if it wasn't originally painted.

On a previous visit to this place we were around the corner and I never saw this entrance.