" I’m relieved to see
that even brilliant physicists make mistakes.”
Kohler looked over. “What do you mean?”
“Whoever wrote that note made a mistake. That column isn’t Ionic. Ionic columns are uniform in width. That one’s tapered. It’s Doric—the Greek counterpart. A common mistake.”
Kohler did not smile. “The author meant it as a joke, Mr. Langdon. Ionic means containing ions—electrically charged particles. Most objects contain them. "

― Dan Brown , Angels & Demons (Robert Langdon, #1)