It is not my habit to comment on my paintings. They should "speak" for themselves. I will however give here some clues: "Big Ben" represents our "newtonian" (classical) time but if you look closely its time is... wrong! It is affected by the nearby galaxy's black hole (Einstein's "General relativity"). The "Event horizon" here is replacing our classical traditional "horizon."
The galaxy's black hole cannot be visible but if you look at the real painting, the canvas is locally dented as would our space-time when considered as a four-dimensional "brane".
"All of my life, I have been fascinated by the big questions that face us, and have tried to find scientific answers to them. If, like me, you have looked at the stars, and tried to make sense of what you see, you too have started to wonder what makes the universe exist. "— Stephen W. Hawking