PARTY SPACE: The long-awaited hub, seen here in a rendering, won’t be for just transit users — it’ll also be available for private events. (
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Get a look at what could be the most expensive catering hall in the world.

The $3.74 billion World Trade Center PATH terminal — a Santiago Calatrava-designed centerpiece known as the Oculus — will be rented out for such events as charity fundraisers, art shows and, yes, maybe even weddings, The Post has learned.

The eye-shaped, multistory space — so large it can fit two-and-a-half Grand Central Terminals inside — has been beset with runaway costs since it was first dreamed up about nine years ago.

The Port Authority envisioned a grand transportation hub akin to Penn Station or Grand Central — but commuters will have to deal with parts of it being closed at times for private events.

To ensure the events are as dramatic as the design, special infrastructure, including screens, lighting and sound systems, will be installed.

“It will be more than transformational,” said Tara Stacom, a vice chairman of Cushman & Wakefield, which is the leasing agent for the connected One World Trade Center.

The Westfield Group will lease and operate the retail and venue space.

While still in the works, the expectation is that Westfield will create a year-round calendar of events.

The added private events could help increase revenue received by the Port Authority — which will go to offset the massive cost of the new hub.

The PATH station is being developed and paid for by the Port Authority of New York and New Jersey, which owns the WTC grounds.