Eowyn's white shieldmaiden gown sleeve detail - it's bound above the elbow, then the lower part is gathered up to those ties with a small tie - also, is it embroidered?
From The Book of Durrow, which is a century medieval illuminated manuscript gospel book in the Insular art style. It was created either at Durrow Abbey near Durrow in County Offaly in Ireland or in Northumbria in Northern England.