Once a palace for French kings called the Palais de la Cité, part of the Conciergerie was eventually converted to prison cells.
Its 1,113 stained glass windows create an otherworldly atmosphere that really has to be seen in person to fully appreciate.
Just behind the Palais Garnier (Paris Opera House) you’ll find the belle epoque department store gem Galeries Lafayette.
The entryways were designed by Hector Guimard a pioneer of the Art Nouveau movement in the early 20th Century.