The Duchess of Vendôme (the late Count’s daughter-in-law) in a black felt hat with tightly upfolded brim;
Farah Pahlavi, Empress of Iran in a black lace veil
Duchess of Montpensier (first wife of the late count) in a beautiful black lace veil
Prince Moulay El Hassan of Morocco in a ceremonial red Fez;
Princess Helene of France and Princess Chantal of France in black brimless fur hats
Princess Lea of Belgium in a wide brimmed fedora;
Princess Isabelle of Liechtenstein in a black mushroom brimmed hat with shallow crown and bow
Two neutral brimmed straw beauties in blush and dove grey from British milliner Dillon Wallwork
For those of you in the throngs of winter, this blue mink hat from Danish milliner Susanne Juul
Red straw textured saucer with crin edge that extends to a neck wrap from Aussie brand Jill & Jack Millinery
Winter white square cloche with exuberant feather trim from British brand Annabel Allen Millinery
Textured statement percher with swirled base and ombre feathers by Aussie Milliner Sandy Aslett
Purple straw percher with crin, net veil and silk flowers from British milliner Edwina Ibbotson
Mustard yellow felt saucer with flower from Czech milliner Jolana Kotabova
Red felt percher with wonderfully curled gold sprayed quills by British milliner Bundle MacLaren
Wide-brimmed, flower trimmed picture hat in the prettiest spring green from Irish milliner Carol Kennelly
Photos from Getty and social media as indicated