This is the very beautiful dress and sandals set that was worn by Lucy Lawless in the Season 2 episode "Balance" (2.08). Of all 5 gowns I have of this character, this is my favourite, even though I love them all and would not part with them! I know another pair of sandals like these was sold and it had the tag "double" on it. So I like to think mine is the one Lucy wore because it has the tag "Lucretia". Of course, I cannot be entirely sure, but one can hope ;-)