Focus on this artwork and explore the Drawings.
There are three drawings in Botticelli's style of Pallas, which may possibly be early ideas for the painting, though none are very close to the final figure, and all seem to be studies for a single standing figure.  In two she carries a large olive branch and holds a helmet.  They are in the Uffizi, the Ashmolean Museum in Oxford, and the Pinacoteca Ambrosiana in Milan.
Uffizi Ashmolean Museum Pinacoteca Ambrosiana Botticelli