fichu

noun1

1. •
   (historical) A woman's lightweight triangular scarf worn over the shoulders and tied in front, or tucked into a bodice to cover the exposed part of the neck and chest.

   • The ‘fichu’ proper, introduced by Marie-Antoinette, not before the décolletée style of toilette made it positively necessary, was nothing more than a lace kerchief worn crossed over the shoulders. — 1868