If all goes as it should, the Hudson waterfront will soon be home to a stunning new park — offshore.

On Monday, The Post published the details of this initiative, along with some artistic renderings. The park will cost $130 million, of which well over $100 million will come from Barry Diller and Diane von Furstenberg, through their foundation.

When it’s done, where now stand only forgotten wooden pilings in the river, the city will have an offshore public square accessible by two walkways.

This will give New Yorkers a fantastic new venue for recreation and entertainment — and the world another testament to Gotham’s reputation for cutting-edge use of public space, just as we saw with the High Line.

Just as exciting is the nonprofit entity the Diller foundation is creating.

Led by Scott Rudin (one of the few people to have earned an Emmy, Grammy, Oscar and Tony Award), its purpose is not to provide another venue for big-name artists during their New York stops but to develop unknown talent. And 51 percent of the live entertainment must be free or “low cost” to the public.

Mayor de Blasio has given it his full endorsement. And what’s not for a progressive to love? This is a park that will serve the public — and yet be paid for by 1 percenters. It will also become part of de Blasio’s contribution to the city’s landscape.

The park’s financing is also a reminder of the public-mindedness of so many of our wealthier citizens, who are responsible for many of the great hospitals, museums and music centers in our city.

These folks are often viewed in this city mostly as sources of tax revenue. But Pier 55, the name of this park, shows what successful, visionary people can do for the public on their own.

In short, Pier 55 is an engineering, architectural and artistic triumph that should sail through its approvals.