sentences:  While initially a center of some regional importance, with the rise of Dos Pilas, Arroyo de Piedra was subsumed as a secondary center within the Petexbatun region.The architecture of Arroyo de Piedra is different from that of Dos Pilas and nearby Aguateca, but bears similarities to Tamarindito.Hieroglyphic data shows that together Arroyo de Piedra and Tamarindito formed an independent polity prior to the establishment of Dos Pilas by Tikal.