Doris Salcedo creates sculptures and installations whose understated appearance belies complex themes. Her works commonly have themes and subjects related to historical incidences of mass violence, trauma, racism, and colonialism; she believes that her art represents a social conscience and sees her own role as that of a witness. Salcedo commonly constructs her pieces with everyday objects, including domestic furniture, hair, and clothing. Sculpture, for Salcedo, “is the giving of a material gift to the being who makes his presence felt in my work.” Salcedo also makes installations that alter existing spaces. She has been known to work with architects and engineers to make works that are set directly and almost imperceptibly into their surroundings.