It's so beautiful, it looks like a fantasy surreal painting turned black and white. I'm amazed at the small lines used on her gown and sleeve and also the pillar structure. The clouds that look like her veil blowing in the wind are mesmerizing. Great job on incorporating the stairs as well. About how many hours did it take for you to do this? It's amazing you got all these details on an A4 paper size.
I used the reference as a guide for the vision I had in my mind. It was the main inspiration for this artwork, I added my own touches with the clouds in the background and made some small modifications which is quite obvious...hope you got it