[Joeri]

Unless it is actively preserved for the entire duration I doubt any modern concrete building will survive 2000 years. Brickwork may last that long, depending on the quality of the masonry. There is definitely some selection bias with ancient architecture, the buildings built to stand forever are the ones that have stood forever.

I wonder how granular people will look at this period of history in 2000 years. Just like how we tend to lump a period of half a millennium together as “roman times” people in 4000 ad might consider a 17th century cathedral and a 21st century court house to be from the same era.