There are a huge number of museums in Marseille. It would be practically impossible for a tourist to see all of them in a matter of a few days. So, before arriving in Marseille, take a look on the internet at the descriptions of all the museums here, and plan to visit at least a few of interest.

Following are some of the most highly recommended museums in Marseille:

Musee de la Marine et de l' Ecomomie: This museum contains items that date back to the 16th century, and all of them are related to the economic history of the city. Some of the artifacts include paintings and models.

Musee des Arts et Traditions Populaires du Terroir Marseillais: This museum has been open to the public since the early 1920s and is a popular tourist destination for anyone interested in seeing what life was like in Marseille between the 17th and 19th centuries.

La Galerie des Transports: This museum is dedicated to showing visitors all about the evolution of transportation systems in the city. The earliest form of transportation included a horse and buggy.

Musee d'Art Contemporian: This museum contains exhibits that are contemporary in nature. Some of the pieces are permanent and some are temporary.

There are some useful links and brief descriptions (in English) of museums in Marseille here