The cap is trimmed with lace and is similar in style to that worn in the van Dyck portrait of the three eldest children of Charles I (nearby). Such caps were worn, with a forehead cloth beneath, by young children of both sexes day and night and were believed to keep the head warm and protect from illness. This cap and forehead cloth form part of a set of christening garments traditionally associated with Charles I. Given that the style of bobbin lace seen here was not produced until after 1650, the association with Charles I cannot be supported.