Which Parisian department store is considered the first modern department store?

Le Bon Marché is considered the first modern department store.

The Paris store began in 1838 as a small shop founded by brothers Paul and Justin Videau. Aristide Boucicaut joined it in 1852 and transformed the business with a broad selection of goods, clearly marked fixed prices, customer returns, advertising, and a more open style of browsing.

These practices helped create the department-store model: many kinds of merchandise gathered under one roof, organized into specialized departments and sold at accessible prices. The store expanded dramatically in the 1860s and 1870s, with a major building designed by Louis-Auguste and Louis-Charles Boileau; later construction also involved engineer Armand Moisant.

Le Bon Marché is sometimes confused with Galeries Lafayette, another famous Parisian department store, but Galeries Lafayette opened later, in 1894. Émile Zola drew inspiration from Le Bon Marché for his 1883 novel Au Bonheur des Dames, which fictionalized the social and commercial world of the grand magasin.