It is unrecognisable. I stood on Gloucester St and took this photo looking north - east to the Colombo St corner - the tall building is the Forsyth Barr building.
And this is the Google Street Map view of the same intersection pre-quake:
I took a photo of the Isaac Theatre Royal on Gloucester St - the brick building to the right in the distance is the entrance/foyer, then there is a space/gap where the audience sat, then the building on the left is the stage - still standing, which a large shade curtain flapping in the breeze:
The entrance to the Central Library:
And the small arcade opposite:
Further round on Hereford St sits Shands Emporium - it had the best vintage clothing store upstairs, and is one of the oldest buildings in the CBD - it used to sit wedged between other buildings (again, a photo from Google):
But now it sits all alone.
Barely intact. I'm guessing the reason it is there at all is because of some sort of protection status, and hopefully it gets restored