Hello there HoodedOracle. Nice to see you.
Hey LigH, how about turning the mansion or a portion of it into a Yliakum history museum? I always thought that PS should have had one. You can use it as a central place for displaying old "artifacts" of say old guilds like RHoP or DE that did shape PS RP history and for players that did so as well like Kada-El. It could also serve to hold items from more recent events and players of note. Maybe even artifacts of events could go there. The rogue invasion of Ojaveda, the night rogue attack, the uncommon cold, one of the Royal Balls, the recent alchemy events, *cough* Xiosiamas... whatever one thinks of them personally they were often interesting.
As it stands, there are fewer players that still remember some of these things so a lot of history could be lost if steps aren't taken to preserve it. There could be renamed items, with brief descriptions, on display and nearby there could be a book that serves as an explanation plaque for why the piece is in the museum, much like the settings books we used to use for RHoP stuff anyway. You could even put artifacts and their "plaques" in shelves or some other container so that it doesn't lag up the area.
However it is set up, it would be a nice place to archive these stories and then it won't have to fall to players to repeat them over and over again. You might even see people come out of lurking long enough to contribute to it. I think it being player run as opposed to "official" would also allow for more flexibility with what can go in there. As long as a piece doesn't break settings, in of itself, it can probably go in the museum, so fuzzy memories, guilds with now questionable settings, and so on might not be a problem.