Mary Myfanwy Piper (/məˈfɑːnwiː/;[1] Welsh: /məˈvanuj/; 28 March 1911 – 18 January 1997) was a British art critic and opera librettist.
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Mary Myfanwy Piper (/məˈfɑːnwiː/;[1] Welsh: /məˈvanuj/; 28 March 1911 – 18 January 1997) was a British art critic and opera librettist.