This book explores textual and visual representations of breast milk and breastfeeding across a range of literary and artistic genres, beginning with Classical mythology, moving through late-antique and medieval gynaecological texts on wet nursing, and ending with late-medieval hagiographical and mystical literature. It argues that, while the act of breastfeeding and the fluid of breast milk were often categorized as natural and nourishing, their meanings, uses and risks were also debated, problematized, and used to serve specific cultural, political and textual purposes.