 The cause or causes of the fire remained uncertain, but its disastrous extent was taken as a sign of offense against Juno, Vulcan, and Ceres-with-Proserpina, who were all were given expiatory cult.Champlin (2003) perceives the expiations to Vulcan and Ceres in particular as attempted populist appeals by the ruling emperor, Nero.The complex and multi-layered origins of the Aventine Triad and Ceres herself allowed multiple interpretations of their relationships; Cicero asserts Ceres as mother to both Liber and Libera, consistent with her role as a mothering deity.