More than a hundred architects, urban planners, historians and professors, architecture critics and journalists, including Pritzker Awards, the President of the Academy of Architecture, and the President of Docomomo France are asking, with a collection of signatures, for the protection of contemporary Parisian architecture and, in particular, the architectural ensemble signed by Michel Kagan and Nathalie Régnier-Kagan in the 13th arrondissement of Paris. It is a complex built in two phases: the first, dating back to 1991, was designed for the design of an office building, the second, in 2010, aimed at the construction of housing for students and young employees, awarded with a special mention in the Clé d'Or Île-de-France competition.

The site in question, in the southeast of the metropolis, was a neglected part of the construction of the Périphérique junction on the banks of the Seine, due to the unfortunate proximity to the fumes of the Syctom waste disposal plant. On either side of the ring road, two important buildings — the Berlier Industrial Hotel by Dominique Perrault and the Cité administrative de la Ville de Paris by Michel Kagan — attracted the attention of the media and the world of architecture in the early 1990s.

This week, however, was announced the project of “Massena Bruneseau”, the new neighborhood that is being built around the redesigned ring road, that comprises over 250,000 square meters of buildings between 100 and 180 meters high. Michel Kagan’s complex, in the heart of the new neighborhood, will be acquired by the AILN development group, which won the consultation organized on the future of this site. The reconfigured block housing the two buildings, called Cité Kagan, will house a housing tower 100 meters high on the banks of the Seine and a social housing building. In addition, the architect's architectural ensemble does not benefit from any protection, either in the form of a Notable Contemporary Architecture Label or in legislative form. The initiative, therefore, appeals to the City of Paris and the Minister of Culture to protect Michel Kagan’s buildings as part of the architectural heritage of the 20th and 21st centuries.