Looking down the Seine at the beautiful buildings. The building in the background with the blue roof is the Conciergerie and it's an important vestige of the Palace of the Capetians, and a remarkable example of 14th-century civil architecture.
At the time of the French Revolution, it was France's oldest prison, and it was there that Marie-Antoinette was incarcerated.
The building, which is located alongside the Seine, features four towers: Tour de l’Horloge, Tour Bombec, Tour d’Argent and Tour de César.