Star Wars: Palpatine REPEATEDLY Told the Jedi He Was a Sith - With His Office Decor 

www.cbr.com -BY ANDREW GLADMAN - In Star Wars, Palpatine held many meetings with Jedi in his private quarters, which should've given the Order a hint as to his true identity.
Keywords: star wars, palpatine, repeatedly, Jedi, sith, office decor, just for fun