Much of Christchurch's history has been lost in Canterbury's earthquakes, but history has also been unearthed.
The demolition of the central city Smith City store and the deconstruction of a heritage building at Christchurch Boys' High School has led to the discovery of long-hidden remnants of the city's past.
Underneath the Smith City building's floorboards, demolition crews have discovered old furnaces still standing.
Smith City chief executive Rick Hellings told Newstalk ZB there are five brick furnaces dating back to around 1875, when an engineering firm was based on the site.
"Basically, we've let everybody go in, have a good look at them. They've taken photographs and whatever records they want. Now we basically fill them in, and cover them over," he said.