Mary “Polly” Winearls Porter (July 26, 1886 – November 25, 1980) was an English crystallographer and geologist, known for her contributions to the English crystallography field and publications about ancient Roman architecture.
She was one of the first people who studied the application of stones in cultural heritage as a legacy of physical artifacts, and intangible attributes inherited from past generations.
Porters extensive knowledge and contribution to her research can be said to have transformed this area of study into an established field of cross-disciplinary research.