Court Gown of Grand Duchess Xenia Alexandrovna, Sister of Nicholas II By Court Couturiére Mme. Olga Nicholaevna Bulbenkova Petersburg, 1894 Blue Velvet, white silk and gold thread Pavlovsk State Museum-Preserve
Ceremonial court dress belonging to Grand Duchess Maria Fyodorovna, Russia (?), 1860s. Silk, tulle, metallic thread, artificial flowers. State Hermitage Museum (link: http://www.hermitage.guide/costume/costume1.html). It is possible that Maria Fyodorovna donned the dress for her engagement to Tsarevich Alexander Alexandrovich of Russia (see detail from Mihály Zichy´s painting of the event, via Imperial Russia's Tumblr). CLICK FOR VERY LARGE IMAGES.
[Previous commenter: The wonderful court dress worn by Princess Dagmar of Denmark, known after her conversion to Orthodox Church as Maria Fyodorovna, at the occassion of her engagement to Tsesarevich Alexander Alexandrovich of Russia.
Anna Pavlova ~ a Russian ballerina of the late to early century, she is widely regarded as one of the finest classical ballet dancers in history; became the first ballerina to tour ballet around the world.