San Lorenzo Colossal Head 9 is also known as San Lorenzo Monument 66 . It measures 1 @.@ 65 metres ( 5 @.@ 4 ft ) high by 1 @.@ 36 metres ( 4 @.@ 5 ft ) wide by 1 @.@ 17 metres ( 3 @.@ 8 ft ) deep . The head was exposed in 1982 by erosion of the gullies at San Lorenzo ; it was found leaning slightly on its right hand side and facing upwards , half covered by the collapsed side of a gully and washed by a stream . Although it was documented by archaeologists , it remained for some time in its place of discovery before being moved to the Museo de Antropología de Xalapa . The headdress is of a single piece without a distinct headband . The sides display features that are possibly intended to represent long hair trailing to the bottom of the monument . The earflares are rectangular plates with an additional trapezoid element at the front . The head is also depicted wearing a nose @-@ ring . The face is smiling and has wrinkles under the eyes and at the edge of the mouth . It has sagging cheeks and wide eyes . The mouth is closed and the upper lip is badly damaged . The sculpture suffered some mutilation in antiquity , with nine pits hollowed into the face and headdress .