A beholder is defined is an observer: someone who gains awareness of things through the senses, especially sight.
These two seemed to me to be a perfect depiction of this definition.
Modelled on a snapshot I took of an elderly gentleman and his dog sitting on a wall at an outside cafe in Munich. They were totally in-sync and it made me wonder just how much their individual awarenesses differed (or were similar) as they sat taking in the scene around them.
Medium: Concrete, Height: 550mm