Bertha Coolidge: A Delicate Hand in Miniature Portraiture Bertha Coolidge (1880–1953) stands as a quietly influential figure within the American art landscape of the early 20th century, primarily recognized for her exquisite portrait miniatures—small canvases imbued with remarkable detail and capturing fleeting moments of human emotion. Born in Lynn, Massachusetts, Coolidge’s artistic journey began formally at the School of the Museum…