As early as 1944, Mitzi had created the first of two marble sculptures — a winged female figure in red Spanish marble entitled "harp-form" — under commission from
Henry Dreyfuss, noted industrial designer, for a new fleet of ships called "
4 Aces" for
American Export Lines. Her first large scale commission was two pieces for the
Festival of Britain in 1951. One, known as
Root Bodied Forth, shows figures emerging from a tree, and was displayed at the entrance of the Festival. In the same studio at 18 Cranmer Road, Greek artist
Leda Luss Luyken explored a similar principle of variable
modularity in the arts in her
ModulArt paintings of the 1980s. Cunliffe developed a technique for mass-producing abstract designs in relief in concrete, as architectural decoration, which she described as "sculpture by the yard". She used the technique to decorate buildings throughout the UK, but particularly in and around
Manchester. One example is a relief panel set high up on the external wall on the 1967–68 modern extension of Altrincham General Hospital on Market Street. Her last major architectural commission was the creation of four carved stone panels for Scottish Life House on
Cheapside in the
City of London in 1970. == Later life and death ==