"There are not many places in the world where an indigenous group, a European settler group and the government can all sit around the table and work harmoniously together.
"Throw in the church as well, and it's one of those wonderful feel-good projects," Mr Blanshard said."
Rangihoua had been a "foot in the door" that paved the way for later European settlements, and ultimately the Treaty of Waitangi. It was also the place where te reo was first written, he added.
A new heritage trail leads visitors from Rore Kahu (Soaring Hawk), an entranceway made from rammed earth and carbon fibre, to Marsden Cross, the site of New Zealand's first recorded Christian service, via a series of panels telling the stories of the settlement and its key players.
Mr Blanshard said there was previously nothing at the site to tell visitors about its importance, or that it used to be a bustling settlement complete with school, brick works and "ropewalk" for making rope. Three large panels show how Rangihoua looked in 1814, the mid-1820s and 1830s.
The opening began with a powhiri followed by a formal ceremony, after which everyone was welcome to explore, picnic, and learn about their history.
Choirs sang and the tall ships R Tucker Thompson and Breeze sat at anchor in the bay to add atmosphere.
Rangihoua can also be accessed by boat. Go to www.rangihouaheritage.co.nz for more information.
Meanwhile an Anglican-led service at Rangihoua on Christmas Day will commemorate the 200th anniversary of New Zealand's first recorded Christian service.