What a great place to use that lens! Very pretty. My first instinct however was to flip it horizontally. My eyes are drawn to the focused portion and just skim through all the creamy blur. If it's flipped the eyes start at the focused portion and can slide into the blur.
I love the swish of windows across the image. My first reaction was that it was too light--but I'm warming up to it. I like the delicate gradations of tones created by the lightness.
I also looked at it as a negative image. I usually don't like reversed images but in this case it made your image look like a night shot with light coming in the windows and illuminating the railings.