Galeries Lafayette are probably the best known of the big Parisian department stores. The three buildings. The Galeries will allow you a quick introduction to Parisian fashion with many brands and designer located at the same place place.
You will see creations of Yves Saint Laurent, Pierre Cardin, Ines de la Fressanges, Chanel, handbags from Louis Vuitton, perfumes from Dior, etc. All located in one place. Also more accessible brands such as Céline, Chloé are there as well as less known brands and less famous designers who still contribute to the Parisian fashion.
The Galeries are located at 40 boulevard Haussman, and are opened from 9.30 AM to 8PM (Monday to Saturday).