Globetrotting chef Jean-Georges Vongerichten has a restaurant and lounge coming next year to the 59th floor of Four Seasons Hotel, atop the Comcast Technology Center.

The name is a state secret.

So I went to the source: Vongerichten himself.

Tuesday night at a Four Seasons-run preview event at Bok Bar in South Philadelphia, he was plating Ensenada sea urchin on black bread with yuzu and jalapeno; grilled sweet corn ravioli with white truffle; and toasted egg yolk with caviar (which is a $45 supplement on Jean-Georges' tasting menu).

"It will be a Jean-Georges," said Vongrichten, whose other brands include ABC, Mercer Kitchen, and Public Kitchen.

The Jean-Georges name hangs over a half-dozen restaurants in such cities as New York and Shanghai.

Hai, you say?

The lounge off the hotel lobby on the 59th floor will be known as Sky High, he added.

There's no timetable for Jean-Georges and Sky High, or for the rest of the Four Seasons Hotel, or for Vernick Fish — the Greg Vernick-run restaurant coming to the skyscraper's ground floor. The public opening of Vernick Coffee Bar is about six weeks away.

Vongerichten, who incidentally mentored Vernick, said the Philadelphia Jean-Georges location will be "similar to what we do in New York."

"You know," he said, as an aside. "The best restaurateur in New York right now is Stephen Starr."

Jean-Georges, given four stars by the New York Times and two by Michelin, uses local, seasonal ingredients. "That will definitely be the case here," he said. "We want it to reflect Philadelphia."

In New York, the Jean-Georges offers a two-course lunch for $68 and a $188 lunch tasting menu. For dinner, there is a $148 three-course fixed-price dinner and two six-course tasting menus, priced at $238 and $248.

Philly prices have not been set.