The New York City Landmarks Preservation Commission lists only 110 interiors worthy of preservation. This article in Metropolis says the challenge is the "temporal nature of interior spaces."
Exteriors may stay the same, but the way we use rooms changes all the time:
"Real estate agents call this phenomenon 'churn,' and it's been around for a lot longer than historic preservation. Still, a landmark interior is required to meet the same stringent criteria as a landmark building. It must be 30 years old and operate in the public realm. To survive that long intact, it has to be lucky enough to have a sympathetic owner-or more likely, a string of sympathetic owners who have understood and appreciated the space. One false step on the march to 30 can leave it vulnerable to alterations and eventual extinction."
FULL STORY: Looking Inward

Analysis: Cybertruck Fatality Rate Far Exceeds That of Ford Pinto
The Tesla Cybertruck was recalled seven times last year.

National Parks Layoffs Will Cause Communities to Lose Billions
Thousands of essential park workers were laid off this week, just before the busy spring break season.

Retro-silient?: America’s First “Eco-burb,” The Woodlands Turns 50
A master-planned community north of Houston offers lessons on green infrastructure and resilient design, but falls short of its founder’s lofty affordability and walkability goals.

Test News Post 1
This is a summary

Analysis: Cybertruck Fatality Rate Far Exceeds That of Ford Pinto
The Tesla Cybertruck was recalled seven times last year.

Test News Headline 46
Test for the image on the front page.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
EMC Planning Group, Inc.
Planetizen
Planetizen
Mpact (formerly Rail~Volution)
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research
NYU Wagner Graduate School of Public Service