Josh
Google
This former charitable center is now three floors of global art exhibits from the museum of Marseilles and a central former chapel with a contemporary art installation, at least when I visited. There is also an outdoor cafe in one corner.
The architecture is the star attraction. Even if not seeing the art, it's a pleasant shaded walk.
Tickets were available free at the ticket office, and not required to walk around the halls but required to see the chapel.