A headstone, tombstone, or gravestone is a marker, usually stone, that is placed over a grave. Especially old or elaborate stone slabs may be called a funeral stele, stela, or slab. The use of such markers is traditional for Chinese, Jewish, Christian, and Islamic burials, as well as other traditions. In East Asia, the tomb's spirit tablet is the focus for ancestral veneration and may be removable for greater protection between rituals. Ancient grave markers typically incorporated funerary art, especially details in stone relief. With greater literacy, more markers began to include inscriptions of the deceased's name, date of birth, and date of death, often along with a personal message or prayer. The presence of a frame for photographs of the deceased is also increasingly common.