Montparnasse was long considered to be a neighbourhood for artists. Today, it has become a full-fledged business district. This economic boom was started in the 1960s, when the Montparnasse Tower was built alongside the new railway station. With its renowned bars and cafés, it is still a highlight of Parisian night life. During the day, those in the district's offices are hard at work. On the corner of the Rue de Rennes, there is a business centre located in an Art Deco building that has come to symbolise this evolution. The most emblematic monument of Montparnasse as a financial and economic hub, though, is of course the 56-story tower that bears its name. All in all, companies take up 100,000 m2 of floor space there, and more than 5,000 people work there every day. This bustling beehive of activity measures 210 metres tall, and is also appreciated by tourists for the panoramic view.

Numerous offices and companies benefit from this excellent location in the north of the 14th arrondissement, near one of the largest Parisian railway stations. Financial services and transportation companies now have their home in what is now the largest business district of the left bank.