... Dr. Osvald Sirén was the first to attribute this Triptych to Bernardo Daddi, that fine early Giottesque master who has only recently "come into his own," and who, aside from the quality of his work, is historically important as the first painter to introduce into the scientific school of Florence the Sienese strain, which practically dominated the Florentine school from the death of Giotto until the advent of Masaccio... (Art in America, Sherman, v.6, 1918)