ルパン三世 princess of the breeze ～隠された空中都市～

The name of this movie is ルパン三世 princess of the breeze ～隠された空中都市～ released in 2013-11-15 and it's main theme is The story is set in Shahalta, a tiny European city-state floating in the air with practically no contact with the outside world for years. The government is transitioning from a monarchy to a republic, and to celebrate the occasion, a national treasure exhibition is being held. Lupin infiltrates the exhibition for the secret royal treasures, but not before sky pirates snatch them first..