On the website of Les Brigittines they refer to it ad the "double de la Chappelle" So I think we can call it Double as it is referd to it like that on the website and other sources
https://www.brigittines.be/fr/locations/locations-des-espaces
https://www.lalibre.be/culture/scenes/2007/08/20/les-brigittines-voient-double-6TVPUGXOCJF55LR5LSDDT2NQL4/
https://www.dhnet.be/archives-journal/2007/08/20/coup-double-aux-brigittines-242MBG3PRND2FIXVL42MHTLQ54/