A pentagram is a five-pointed star. When inscribed inside of a pentagon, it becomes a symbol that was of importance to the ancient Pythagoreans. The inscribed pentagram embodies the golden ratio in many ways and was used in part to identify members of the Pythagorean school.

The inscribed pentagram is also the shape of the K5 graph, a complete set of 5 vertices all connected to one another.

Here the graph is represented by a group of 5 men, with their legs forming the pentagon, their arms forming the pentagram, and their heads doubtless lost in mystical contemplation of all that is good and beautiful.


This was one of the earliest pictures in the Naked Geometry project and has become the project's symbol. The work was shown at Bridges 2011 in Coimbra, Portugal.

A more complicated version with female figures was created in 2011.

Below is a 2009 remake of the original pentagram with both female and male versions.

In 2013, the model on the right was printed in stainless steel as a necklace pendant.