Bettina Grossman, an eccentric and quirky artist, holed up at the Chelsea Hotel for 50 years, died Nov. 2 at a Brooklyn Care Center. She was 94.

For much of the 1950s and ‘60s, Ms. Grossman worked as an artist in Europe. But after a series of career disappointments, she isolated herself as a permanent resident at the Chelsea, fiercely guarding her privacy and the trove of art she had produced in her prime in New York and Europe. She refused guests and kept her apartment door secured with heavy locks.

Toward the end of her life she and her work, largely abstracts and photographs, became more widely known. She was the subject of two documentary films and allowed a small circle of fellow artists to have her pieces catalogued and exhibited in shows in New York and Germany. Her work is currently on display at the MoMA in Manhattan and at MoMA PS1 in Queens.