sentences:  The arrangement of the stelae and altar precisely mimics the orientation and relationships of the E-Group astronomical complex at Uaxactun, suggesting that the monument group served a similar purpose.The siting of the stela-altar complex on the edge of an east-facing scarp offers a perfect location for observing the sunrise.Ceramic finds from the southern portion of the stela platform have been dated to the Late Preclassic and the Late Classic periods.