Four agencies worked together on the week-long project.
The Otago Goldfields Heritage Trust came up with the idea of stabilising and preserving the ruins of the 117-year-old building and asked if Otago Polytechnic Cromwell campus stonemasonry students wanted to be involved in the project.
The site was on a small Department of Conservation reserve, so Doc was also involved, as was the New Zealand Historic Places Trust.
Historic places trust Otago-Southland archaeologist Dr Matthew Schmidt, who worked on the bakehouse, is one of 16 international correspondents for Unesco's cultural heritage protection co-operation office, based at the Asia-Pacific cultural centre in Nara, Japan.
He will publish a report on the project which will be sent to all member countries.
"This was an excellent example of a good team effort with everyone contributing their time and resources. It shows what can happen when the community decides to make something happen and several agencies get together," Dr Schmidt said.
Specialists from several fields collaborated on the project and volunteers played a major role, too, he said.
As a result, a commercial oven was unearthed, which was the best preserved example of a 19th-century oven on a Clutha basin goldfields site.
It was built by James Lawrence, who built commercial ovens at other goldfields in the area.
The oven had regional significance and was a "bonus find", Dr Schmidt said.
Rubble around the site was cleared during the week, and the ruins were capped and sections of unstable walls fixed.
The building, 20km from Cromwell, is almost all that remains of the once-flourishing Bendigo township.
Restoration mason Keith Hinds, of St Bathans, likened the restoration work to piecing together a stone jigsaw.
Diagrams were drawn of the position of each stone removed and each one was placed back in its original place once mortar had been added.
"Local soil and slake lime is used to make the mortar and it'll harden up over time. That's what was used originally and within less than a year it'll weather to blend in, so you can't tell it from the original," Mr Hinds said.
The style of the stonework was random stack with a flush face.
