The Mama Negra is a traditional festival held twice a year in Latacunga, Cotopaxi Province, Ecuador. Also called La Santísima Tragedia (The Holy Tragedy), it is a celebration in honor of the Virgen de la Merced (Virgin of Mercy), who is said to have stopped an eruption of Cotopaxi volcano in 1742. The festival is also a celebration of the anniversary the city of Latacunga's independence.[1]