Fanfic/Songfic regarding "Michael Jackson's Ghost" Question? (as also publicado in that club)

I'd like to do a fanfic/songfic of this awesome video and I have my own ideas on how to kinda make it work with my ideas, but I was wondering regarding the Maestro's 'family' what century/year do tu think they appear to have came from? I'd kinda like an estimate because there's going to be flashbacks in the fic and I'd like to have an idea of where to base the flashbacks. Thank you!!