I live in an ancient city, in a medium-old apartment--one that is rapidly approaching its bicentennial. Like any building in continuous occupation for nearly 200 years, form and function have changed: it's been retrofitted with indoor plumbing, gas central heating, electricity, broadband internet. The kitchen has shrunk, a third of it hived off to create a modern (albeit small) bathroom. The coal-burning fireplaces are either blocked or walled over. Three rooms have false ceilings, lowered to reduce heating costs before hollowcore loft insulation was a thing. What I suspect was once the servants' bedroom is now a windowless storeroom. And rooms serve a different function. The dining room is no longer a dining room, it serves as a library (despite switching to ebooks a decade ago I have a big book problem). And so on.
But certain features of a 200 year old apartment remain constant. There are bedrooms. There is a privy (now a flushing toilet). There is a kitchen. There is a living room. And there is a corridor.