1820 Court

She's wearing a court dress from 1820s. Formal court dresses varied from normal, evening gowns. They were lavishly decorated and had long (usually detachable) trains. She wears her hair in a bun at the top of a head, decorated with big feathers, with shorter hair in curls, parted in the middle. She's also wearing an Elizabethan ruffed collar. Ruffs had a bit of a comeback in the late 1810s and 1820s, along with "Gothic" decorations and trims.

More 'robes de cour':
1670: tadarida.deviantart.com/art/16… and tadarida.deviantart.com/art/16…
1680: tadarida.deviantart.com/art/16…
1720: tba
1760: tba
1770: tba
1780: tadarida.deviantart.com/art/17…
1807: tadarida.deviantart.com/art/18…

Russian court dresses: tba