The rebuilding of central Paris also encouraged commercial expansion and innovation. The first department store, Bon Marché, opened in Paris in 1852 in a modest building and expanded rapidly, its income increasing from 450,000 francs a year to 20 million. Its founder, Aristide Boucicaut, commissioned a new glass and iron building designed by Louis-Charles Boileau and Gustave Eiffel that opened in 1869 and became the model for the modern department store. Other department stores quickly appeared: Au Printemps in 1865 and La Samaritaine in 1870. They were soon imitated around the world.