Section: A, B, C
- Client: Curia Kirchberg S.A.
- Architect: Atelier d'Architecture Paczowski Fritsch & Associés
- Main services: Turnkey construction of the project
- Storeys and areas: 900 underground car parking spaces
- Gross building area: 71,000 m² GFA
- Construction period: 1986–1994
Section: D
- Client: Administration des Bâtiments Publics
- Architect: Dominique Perrault in cooperation with Fritsch and Paczowski M3
- Contract value: €25 m
- Areas: 250,000 m² converted space, 41,000 m² floor area
- Gross building area: 71,000 m² GFA
- Construction period: 1986–1994
- Building dimensions: Anneau: 169 m x 110 m x 23 m,
- Palace: 43 m x 103 m x 30 m, car park: 90 m x 27 m
- Building materials: 26,000 m² concrete, 3,050 t reinforcing steel, 5,000 t rolled steel sections
- Construction period: November 2004 to July 2006