Ancient Yamada Manor, Sakura City.
This ancient manor could be dated from the Sakura Abode Country's foundation when the Pendragon and Yamato clans sealed the deal to unite the land.
When the two clans sighed the treaty, the Yamada clan was only a side clan of the main Yamato clan, but they still had enough prestige to build a manor in the new nation's capital.
After centuries since that historical event, the main Yamato clan got lost in the pages of history, but the side branch of the clan prospered.
It was possible to see that the manor was carefully taken care of to preserve its history, but it was still possible to see that modernity crawled over into the mansion.
The manor had the latest technologies in the market, but at the same time preserved its ancientness.
When someone entered the place, it was possible to feel and see how ancient the place was.