Context : Preparing for a Fancy Dress Ball, also known as The Misses Williams-Wynn, is a 173 by 150 cm (68 by 59 in) oil on canvas by English artist William Etty, first exhibited in 1835 and currently in the York Art Gallery. 
Answer : York Art Gallery
What is the name of the place where Preparing for a Fancy Dress Ball can be found?