[ben_w]

> White House is from 1800.

The facade perhaps, but not the inside which dates to c. 1950: https://en.wikipedia.org/wiki/White_House_Reconstruction

[bluGill]

Any building that is in active use needs to get major remodels every 30-50 years, and less major remodels every 5-10. The whitehouse has had significant changes since 1950, though not to the level of the 1950 changes.