A mansion or large residence: an elegant, often stately house.
その邸宅は歴史的建造物として保存されている。
The mansion is preserved as a historic building.
富豪の邸宅には広い庭と噴水があることが多い。
Wealthy people's residences often have large gardens and fountains.
案内された邸宅の内装は豪華そのものだった。
The interior of the mansion I was shown was simply luxurious.