lively picture without painting: Katsura Imperial Villa

This is one of buildings in an aristocratic villa, built about 400 years ago.

This simple house faces to the pond and inside the building are not any pictures and decorations.

Was the holders of this house poor?
No, they were very rich.

So why is this so simple and not decorative though they were rich?
Any pictures are not needed because there are supreme and three dimensional living-pictures outside, the nature itself.
Location by Google Map