Themis is the goddess of law and undisputed order. Themis is one of the titans,Daughter of Uranus and Gaea. She was also once was Zeus's second wife.
Themis substituted her mother from the Oricle of Delphi. later on when Apollo was born, themis offered Apollo to the Oricle.
A golden leaf was a symbol to her allies that she was the one that made the rules and will make sure others will be turned to justice.
She is also very famous in many museums