The deconstruction of Christchurch Cathedral started yesterday with the arrival of a crane at the central city site - just as calls for its protection stepped up.
The Canterbury Earthquake Recovery Authority said the crane would be set up before any work started on the demolition.
Meanwhile, the Unesco World Heritage Centre joined calls for the cathedral to be saved from the wrecker's ball, saying that while the building was not a world heritage site, its symbolic value needed to be taken into account.
Spokeswoman Gina Doubleday said although the survival of the cathedral might appear to be expensive at first, saving it would help maintain the character of the city, bring it business opportunities and increase property values in the long term.
A restored cathedral would testify to history and continuity of cultural life that a brand new building wouldn't be able to convey, she said.