Good Day!
The Lady in White (aka Portrait of Elsie Palmer painted at Ightham Mote in Kent) by John Singer Sargent 1889-90 
(Fine Arts Centre in Colorado Springs - currently showing at Tate Britain)

https://files.mastodon.online/media_attachments/files/112/081/861/821/610/057/original/212aa26df69dc681.jpg