Old mansions, even if they stand empty and abandoned, are of interest to specialists who study the history of ancient aristocratic families. In the game Seven Doors Adventure, you arrived at one of these mansions as part of a small group, but arrived at the site before the milestones. Deciding not to wait for anyone, you opened the door and found yourself in a small corridor, at the end of which you saw another door. It is locked and there is no key in it, but there is a niche in the door, apparently it is intended for some object, which is the key. Having found it, you will open the door, but then you will find another one. The house is essentially a set of seven doors in Seven Doors Adventure.
