Early work for the $2.5 billion City Rail Link project started today with a dawn blessing of the work site.
About 80 people gathered on the corner of Victoria and Albert streets in central Auckland as kaumatua blessed the site.
Mayor Len Brown said it was a day that Aucklanders have been contemplating for almost a century.
"In 1923 Railways Minister Gordon Coates gave his support for a city-to-Morningside underground rail line that never happened. In the 1970s, Mayor Sir Dove-Myer Robinson's rapid-rail proposal met a similar fate.
"Today's blessing means that in the coming months, Aucklanders will see the CRL starting to take shape."