Our City Hall here in Brisbane is undergoing a huge restoration at present I took these shots off the TV.
The renovations will take at least 2 years.
As it was originally built on a swamp, there has been significant rising damp, water & rot in the foundations over the years.
The photos here are of the main hall floor being dug up. They found a street & many artifacts there - very interesting!
If you would like to see more check out this site:
There are 2 slide shows - very interesting :) - enjoy!