white silk long sleeve dress self-portrait - Lace Satin Maxi while the gathered hip detail adds soft dimension Helsa Serafina Silk Dress in

1,000 The number of guineas the royal family was invoiced for the dress

Neckline & Sleeves: Bateau neckline, three-quarter sleeves

Brown/Getty RELATED: Halle Berry Says Her 'Place' in Hollywood 'Didn't Change' After Oscar Win: 'It Was Surprising' In an Instagram post including a snapshot of the dress in its exhibit, Berry thanked the museum for honoring her and the designer piece in such a way

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Like olive oil, it's full of oleic acid, a heart-healthy monounsaturated fat