From niceartgallery.com/Angelo-Bronzino/Isabella-Av-Medici-oil-painting.html; enlarged by half.
This dress has an off-white under-bodice and over-bodice made of a beautifully-patterned cloth.
Keywords: Bronzino, Isabella de’ Medici, Isabella Ramola de’ Medici, Medici family, Orsini family, Italian, wavy coiffure, jeweled floral headdress, under-bodice, high enclosing neckline, collar, necklace, buttons, long close under-sleeves, cuffs, fitted bodice, vee neckline, collar, lining, jeweled bodice ornament, rolled cap over-sleeves, girdle, vee waistline, full skirt