By 100 BCE in the art of Mathura, reliefs start to represent more complex scenes, defining, according to Sonya Rhie Quintanilla, an age of iconic diversification and narrative maturation. Some reliefs, such as the Katra architrave, possibly representing Brahmins and the cult of the Shiva Linga. These reliefs from Mathura are dated to circa 100 BCE. These examples of narrative reliefs, although few remain, are as refined and intricate as the better known Buddhist narrative reliefs of Bharhut, Sanchi or Amaravati.