Update, 6 pm: At the request of Lovett Commercial, the company’s renderings of this project originally included in this story have been removed.

Hadn’t heard that Dutch architect Rem Koolhaas and his Office for Metropolitan Architecture have been designing the massive redo planned for the 16-acre campus around Houston’s shuttered Barbara Jordan Post Office at 401 Franklin St. Downtown? Or that the project’s owner and developer, Lovett Commercial, is boasting that the 530,000-sq.-ft. redevelopment, on a site along Buffalo Bayou, will include the world’s largest urban rooftop farming operation, supplying a 40,000-sq.-ft. festival food market below? Maybe that’s because none of this has been officially announced yet.

There’s more to the plans being waved about: apartments, live-work studios, coworking and maker spaces, parks, events venues, a combined 100,000 sq. ft. of indoor and outdoor markets and even a digital library honoring Barbara Jordan. More than just that library is being named after the former post office facility, however: As of last year, the entire venue has been dubbed Post Houston (or Post HTX for sorta-short.) Also, because it’s what comes next for the city — get it?

“Post Houston aims to be a world class creative campus for technology, the arts, culture, and dining,” announces a Lovett Commercial leasing brochure. Here’s a walkthrough of some of the ambitious project’s proposed main features, using images that appear to date from earlier this year:

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Even before any changes have been made, the existing complex looks like a site tailor-made for Koolhaas — a longtime champion of ’50s-modern office buildings and the kinds of plinths formed by the sorting-facility warehouse:

And at first glance, his design appears to transform the Mod complex into something ever-so-much-more-so: popping occupiable rooftop gardens, park areas, skylights, and even what looks like an auditorium atop the extended warehouse building, and carving up the structure into a series of pavilions meant to house different functions at different levels:

Here are a couple of views of the cleared-out interior of the existing 5-story office tower:

and the much larger sorting facility structure to its north:

Renderings show the tower interior remade as apartments:

. . . and creative-office and collaborative workspaces:

. . . including this atrium:

The cutaway drawing below appears to show a typical sectional strategy for the warehouse space, with gardens at the top, small apartments or live-work studios on an upper level, cafe, food hall, and shopping areas on the main level, and makerspaces at the bottom:

Additional renderings show the planned epicurean market, meant to become “Houston’s ﬂagship food hall,” serving — yes — “roof-to-table organic produce” grown onsite:

These views show the more dramatic food-hall and market areas, under new popped-up skylights:

Also: shopping — featuring “local and international designwares,” as well as popup shops:

Parklike spaces would be on the roof, presumably separated from farming operations, with room for daytime and nighttime events:

Included in the project: access to Buffalo Bayou Park, through this handy ramp directly south of the main post office building:

If all this seems overly ambitious for a redo, it might be: Included among the materials are renderings of what looks to be a scaled-back project, though it’s not clear if the drawings represent an alternate design or a proposed first phase. These images show much of the surface parking on the southern half of the complex left alone — enough for more than 1,000 cars, according to descriptions — and the exterior of the sorting facility left mostly intact:

Here’s an older promotional video for the project:

Images: Post HTX/OMA/Lovett Commercial. Video: Post HTX/OMA/Lovett Commercial/Josh Moore

Post HTX