María Emilia Riquelme y Zayas (5 August 1847 - 10 December 1940) was a Spanish Roman Catholic religious sister and the founder of the Misioneras del Santísimo Sacramento y María Inmaculada. In her childhood she moved from place to place, since her father was an officer and was moved to different barracks across the nation. All the while she studied in boarding schools to perfect her knowledge in French and art. After her schooling she felt drawn to the religious life (based on a vision she experienced when she was seven) and set herself on entering a convent after her father (who opposed this vocation) died. But ill health forced her to give up this idea and she instead founded a congregation of her own alongside several like-minded women who made the poor the focus of their apostolate. Th