A thelony was a medieval toll or fee. It might be just or unjust. A just thelony was a toll paid as compensation for what would now be considered a public service. An unjust thelony was a fee exacted contrary to custom or where no service is rendered to the person made to pay it. The word “thelony” may be derived from the late Latin word “toloneum” (alternatively, “telonium” or “teloneum”) meaning toll house, which may be a transliteration of the Greek “telonion” (τελώνιον), meaning a place where taxes or tolls are collected.