Complex sentence: Henrietta Moraes (d.1998) was a famous Soho beauty in the 1950s, a habituée of the Colony Room, who became the muse of a number of important British artists in the early 1950s through the mid- 1960s.
Split into simpler sentences: Henrietta Moraes (d.1998) was a famous Soho beauty in the 1950s. An habituée of the Colony Room, she became the muse of a number of important British artists in the early 1950s through the mid- 1960s.