Personal Coat of arms of Francis I, Holy Roman Emperor
Arms of Lorraine of 1538  combined with the arms of the Medici family 

Blazon: Quarterly, I barry of eight gules and argent (for Hungary) impaling azure semy-de-lis Or a label gules (for Naples); II argent a cross potent and four crosslets Or (for Jerusalem) impaling Or four pallets gules (for Aragon); III azure semy-de-lis Or a bordure gules (for the House of Valois-Anjou) impaling azure a lion sinister rampant Or, armed, langued, and crowned gules (for Guelders); IV Or a lion rampant sable, armed and langued gules (for Jülich) impaling azure crusilly fitchy, two barbels addorsed Or (for Bar); overall an inescutcheon Or a bend gules three alerions argent (for Lorraine) impaling Or six roundels in orle, one at the chief point azure three fleur-de-lis Or, the rest gules (for the Medici family).
Modified from
Ipankonin