Many Christians know precisely one thing about the Sadducees: "they didn't believe in the resurrection, for they were "sad, you see."
What they don't often know is that the Sadducees were the ones who ran the Temple, held the offices of high priests, and ultimately were the ones who handed Jesus over to the Romans to be executed.
Because of their religio-political standing, their association with the Temple was paramount. So when the Temple was destroyed around 70AD, so went the Sadducees.