>>90131947>when did the Monster Massacre happen
Hundreds of years ago.>is the mural of him and Moon fighting part of the massacre portrayed in tapestry?
We have no idea how old Toffee is, but we know he's old enough that he fought Moon when she was a young woman (presumably ~30 years ago) and he doesn't seem to have aged much since. Moon's portrait calls him "the immortal monster" but again, it's ambiguous if this means he's older than he looks or just referring to his regeneration.>didn't this happen many generations ago when the Mewnians got their independence
Yes. The oldest Queen we know is Eclipsa, Star's ninth great-grandmother, and there were certainly Queens before her. The founding of Mewni was long before that.
It should be pointed out that even though "Mewnipendence Day" is an obvious parallel to the colonization of America, the Mewmans weren't oppressed or anything, they just came in and slaughtered the native monsters and have enjoyed their kingdom ever since.