Two sisters, one father: Christian de Portzamparc

Born in Casblanca in 1944, Christian de Portzamparc is an architect and an urban planner who graduated from the “École des Beaux Arts” in Paris in 1969. He founded his agency the Atelier Christian de Portzamparc in 1980. In 2010, the agencies of Elizabeth de Portzamparc and Christian de Portzamparc pool their resources as each designer keeps their team and specificity. Based in Paris, France, they build worldwide, surrounded by a loyal team of more than 100 people, organized into various "studios" working with partners on a wide range of ambitious international projects.

Following his renewed vision of urban structure that he named "open island", his work focused on research in urbanism and focuses on the quality of living spaces.

From singular buildings to redesigned urbanism, the city is indeed part of the founding topics of his work, simultaneously developing and overlapping on three main themes: landmark buildings, towers and neighbourhoods from the urban island scale to the development of major cities.

In 1994, Christian de Portzamparc is the first French architect to be awarded with the Pritzker Prize, the highest honour in architecture equivalent of the Nobel prize, at the age of 50.
Portrait de Christian de Portzamparc, architecte des tours Sisters


Unibail-Rodamco is the project's developer and investor through its subsidiary SCI CNIT Développement.

Created in 1968, Unibail-Rodamco SE is Europe’s largest listed commercial property company, with a presence in 11 EU countries, and a portfolio of assets valued at €40.5 billion as of December 31, 2016. As an integrated operator, investor and developer, the Group aims to cover the whole of the real estate value creation chain. With the support of its 1,985 professionals, Unibail-Rodamco applies those skills to highly specialized market segments such as large shopping centres in major European cities and large offices and convention & exhibition centres in the Paris region.

The Group distinguishes itself through its focus on the highest architectural, city planning and environmental standards. Its long term approach and sustainable vision focuses on the development or redevelopment of outstanding places to shop, work and relax. Its commitment to environmental, economic and social sustainability has been recognized by inclusion in the FTSE4Good and STOXX Global ESG Leaders indexes. The Group is a member of the CAC 40, AEX 25 and EuroSTOXX 50 indices. It benefits from an A rating from Standard & Poor's and Fitch Ratings.

Other partners of the project

The design team is mainly composed of:

EPADESA: The La Défense Seine Arche national interest operation (564 hectares) is run by the public development authority EPADESA, in the municipalities of Courbevoie, La Garenne-Colombes, Nanterre and Puteaux. Its role is to implement an urban project which is exemplary in terms of sustainable development, and be an initiator of innovative and collaborative projects. As a place of economic and social vitality and a strategic area, La Défense Seine Arche enjoys a high level of attractiveness on a local, metropolitan and international level. The challenge is to create a place to live in, with all its aspects, developed through a diversified programme based on a high-quality living environment, a residential housing supply for everyone and sustainable commercial developments meeting international standards.

Defacto: Defacto was created by the law of 27 February 2007 to meet the needs of Europe's leading European business district. This public institution, the Établissement Public de Gestion du Quartier d’Affaires de La Défense, is responsible for managing, promoting and energizing the public areas conferred to it by the law.

City of Puteaux (Where the project will be located)

City of Courbevoie (Neighbour of the project, in particular the “Faubourg de l’Arche” district)