What did the Gordian Knot look like?

What do you think the Gordian Knot looked like?

Wikipedia reports that,

In 333 BC, while wintering at Gordium, Alexander the Great attempted to untie the knot. When he could find no end to the knot, to unbind it, he sliced it in half with a stroke of his sword, producing the required ends (the so-called "Alexandrian solution").