Alma 19:1 says that the people close to king Lamoni "were about to take his body and lay it in a sepulchre, which they had made for the purpose of burying their dead." According to the Mesoamerican historican Ixtlilxochitl, it is observed that the Tultec kings were buried shrouded and with their royal insignias, in the temples . . . It was also the practice (of the ancients of Israel) to bury, with the dead, objects which had been used by the deceased during life and in the case of the kings of Israel this would include royal insignias. [Milton R. Hunter and Thomas Stuart Ferguson, Ancient America and The Book of Mormon, pp. 326-327]
“Sepulchre”
According to John Sorenson, at Kaminaljuyu tombs of the Book of Mormon time period have been excavated that give us a good idea of what a Lamanite "sepulchre" (Alma 19:1,5) probably looked like. Tomb I in Mound E-III-3 was found to contain the remains of some highly honored person. The tomb had been dug down into the top of the artificial mountain, the largest single earthen form at the dead city. Terraces or benches had been left along the walls of the hole cut down into the clay fill. The richly dressed corpse had been carried there on a litter, no doubt accompanied by an extensive procession of mourners (compare Alma 18:43). After the litter bearing the corpse, (head to the south), had been carefully placed in the center of the burial chamber, rich furnishings and equipment for use in the life after death were placed on and around the body. When the ceremony was completed, a flat timber roof was constructed and covered with clay fill. [John L. Sorenson, An Ancient American Setting for the Book of Mormon, F.A.R.M.S., p. 237]