I have a question. I was at the Alexander Palace two years ago and I surprised how close to the street the palace is located. In both of the old photos, there seems to be much more park area and no street where I expect to see it. Was the location of the street along the side of the palace altered after these photos, or has it always been where it is today?
This photo is at a different angle than what you are probably thinking. What you see is the left side and back of the AP, where the pond is. The street is at about 1 o'clock in this photo. Here are some contemporary shots, at (kind of) the same angle as the b/w photo, to give you an idea of what I am talking about. Today most of that area around the AP is surrounded by trees, so you can't really it see tha palace that well from that angle.
Closer photo, which does not include the area where the balcony was:
[Sort of] the same angle seen from farther away, across the pond:
The area where the balcony would have been is now covered by trees.
Here are two paintings of that area - at that same angle, circa eary- to mid-1800's (no balcony yet).


I hope this helps.