A broken iron ring..

I was walking along a street at Budapest, when a noise, like a soft moan, made me look at a building..
There , at top, I saw a horse, frozen like a metal sculpture.. prisoner at the column.
I made a shot.. I stayed a moment.. and then, went on my walk.
But I heard a sound, like a broken iron ring..
Then, a flap of wings..
I didn't turn back to see.