Lady Elizabeth may have been the mystery architect for some 400 buildings. She mentored Christopher Wren and helped him design 18 of the 52 Wren churches built in London after the Great Fire. Her Wikipedia article is here and her article in thepeerage is here.
From g1b2i3.wordpress.com/2010/09/14/sir-peter-lely-14-septembrie-1618-–-30-noiembrie-1680-pictor-olandez/. Also posted to the “Casual” Dress Album here.