Nell Gwyn Portrait

I found this portrait of a lady in the 17th century, and i think that the dress she wore looks quite similar to the one worn by Nell Gwynn in her portrait by Peter Lely

They are both of a similar colour, but the first one is a bit more formal and looks like a fully fastened up version of Nell's Dress. Poppea's costume could be made to look either done up or undone depending on the situation and who she is talking to. For example, when Poppea is with Nero she could be looser and more undone, but when she meets with Ottone and rejects him she could be more formal.