Calceos mutavit He has changed his shoes, that is, has become a senator. Roman senators were
distinguished by their shoes, which were sandalled across the instep and up the ankles.

I am surprised that I don't know of any English words derived from "calceos". And I get the impression
that "sandalled" as used here refers to the crossing straps that held the foootware in place. I have
never seen this verb before.