I took the attached pics last year in the Morvan in central France, where my wife and I were camping in our VW van by a lake. The insect caught my attention as it was sucking greedily at the grouting on the open-air washing facility tiled floor. Looking closer I noted that was a Purple Emperor (I have never seen one before). It flew outside where I snapped it perched on a vehicle wheel. We returned this year but didn't see anything interesting on the campsite save for White Admirals, Painted Ladies and the like. We did however spot an unusual white in a rose hedge (ouch!) and took a poor picture which revealed a Black-veined White.
Hope this of some slight interest,