I want to know the answer to the following question:
What was the last coin to be converted to the modern day style of having historic Americans on the face?
All the background I'm provided with is that "The currency as we know it today did not get the faces they currently have until after the early 20th century; before that "heads" side of coinage used profile faces and striding, seated, and standing figures from Greek and Roman mythology and composite Native Americans.". Is that enough to answer the question?