Knights in white sat in
Never rich in the end ...
Those (poor) knights are living in this house:
... which was conceived as a modular build:
Originally it was meant to be part of a castle but eventually it became a building of its own right.
This guy is living upstairs.
Pity, that we don't know what they are discussing.
Maybe they have written some letters but not each one of them is comfortable with sending them. Who knows?
C&C welcome!