December 1st 2017 Adèle van Rijckevorsel passed away at 96 years of age in her home in The Hague.
She was a dear friend of Constant and they were in a relationship from about 1979 till 1991. Had she accepted his proposal, she would have been his wife.
Adèle was an important influence on Constant and his work. She worked relentlessly to promote his work, organize exhibitions at her house and mediated numerous sales of his work to her network. She was one of his personal advisors till his passing in 2005.