"He has brought the world of opera to the masses and his wanting to come here to give back in this charitable way is testimony to the calibre of the man. It is incredibly rare for New Zealand to get agreement for the most internationally significant artist to visit these shores, let alone have him prepared to give back to the city in this way.''
Domingo, one of The Three tenors, can empathise with Christchurch's loss of life, having lost four of his own family members in the magnitude 8.1 earthquake that struck Mexico in 1985 and killed an estimated 10,000 people.
Mr Doig said the October concert was also a vote of confidence in the city.
"It will reassure any promoter considering bringing an event to Christchurch that he or she can do so with confidence. The timing of this event, just before the Rugby World Cup quarter-finals, is significant too. Since Christchurch is not now playing a part in the RWC, it's great to have a different event of international significance at that time.''
Court Theatre chief executive Philip Aldridge said it was humbling that the multi-Grammy award winning artist would come to support the quake-damaged theatre, which is trying to raise $4.6m to reopen again by December.
Christchurch Symphony Orchestra chief executive James Caygill said it was a wonderful gesture from a great man.
"It's such a coup to have him here at all, let alone to give a performance purely to support this city's arts culture.''
The CSO lost its base in Christchurch's Arts Centre in the February earthquake, as well as access to its primary venue, the Christchurch Town Hall, and had to cancel all of its concerts to the end of July.