| Dani Karavan - Sculptor and designer | Author of the Major Axis, involved 30 years. |
| Michel Jaouën - Urbanist | Initiator of contact with Karavan. |
| Ricardo Bofill - Architect | Designs neoclassical buildings around. |
| François Mitterrand - President of the Republic | Inaugurated in 1990. |
| Jean-Paul Huchon - President of the Regional Council | Relaunched the project in the 2000s. |
| Dominique Lefebvre - President of the urban community | Support the finalization of stations. |