Mark 12:16
And they brought it. And he saith unto them, Whose is this image and superscription? And they said unto him, Caesar's.
And they brought it,.... The penny, which was a Roman one, and worth seven pence halfpenny of our money:
And he saith unto them, Whose is this image, and superscription; for it had the head of an emperor upon it, very likely the image of the then reigning emperor Tiberius, and a superscription on it, expressing his name, and perhaps a motto along with it:
And they said unto him, Caesar's; one of the Roman emperors, Augustus, or Tiberius; most probably the latter;
See Gill on "Matthew 22:20",
See Gill on "Matthew 22:21".