The interior of Neolithic tombs in Europe is frequently decorated with carved and painted motifs. In Sardinia (Italy), 116 rock-cut tombs have their walls covered with bucrania (schematic depictions of cattle head and horns), which have long been interpreted as representations of a bull-like divinity. This article reviews similar examples of bucranium ‘art’ in the tombs of three traditional societies in South-East Asia, focusing on the agency of the motifs and their roles within social relationships between the living, the dead, and the spiritual world. From these ethnographic examples and the archaeological evidence in Sardinia, it is suggested that bucrania in Neolithic tombs were a specialized form of material culture that had multiple, cumulative effects and functions associated with social display, memory, reproduction, death, and protection.