Wasn't M. de Sade a prisoner there then, my memory is hazy?
He was transffered from the Bastille to Charenton a couple of weeks before the Storming. Apparently he just escaped the guillotine during the Reign of Terror by writing an admiring eulogy of Marat.
No, I'm certain he was not there. I suppose a quick web search on him would confirm it, but I am absolutely certain he was not there. The people there were ordinary criminals.