Several well-known French artists designed many vintage posters from this period; Poster campaigns soon transformed the avenues and boulevards of Paris into the “art galleries of the street”. With various competing shows distributing posters all over the city. The commercial success of these poster campaigns was such that some of the poster artists were in such high demand that many theatre stars of the time insisted on choosing their favourite artists to do the design for the poster campaign of an upcoming performance. The popularity of poster art was so high that a large exhibition was held in Paris in 1884. Some of the most famous vintage posters in history are from the 1890 s of the style known as Art Nouveau. The class was the first significant art form where mass-produced graphics were produced.