Abalessa is a stone funerary monument in the Atakor sub-range of the Hoggar massif of southern Algeria, eighty kilometres west of Tamanrasset. The monument consists of a circular dry-stone enclosure approximately twenty-five metres in diameter and four to five metres in surviving height, with internal chambers reached through a single eastern entrance.
The site was first investigated by the French archaeologists Maurice Reygasse and Byron Khun de Prorok in 1925–1927, who identified an elite female burial in the principal internal chamber. The skeleton was accompanied by a cedar-and-leather bed, gold and silver jewellery, glass beads imported from the eastern Mediterranean, and a partial collection of low-denomination Roman coins of the early fourth century, dating the burial to the late third or early fourth century CE.
Tuareg oral tradition identifies the burial as that of Tin Hinan, the legendary ancestress of the Kel Ahaggar Tuareg, who is said to have migrated south from the Tafilalt region of southeastern Morocco to the Hoggar in the early centuries of the first millennium CE. Whether the Abalessa burial is in fact that of Tin Hinan, or whether the local oral tradition has retrospectively attached the name to an earlier elite female burial, remains unresolved in the scholarly literature.
The site is the principal pre-Islamic monument of the Hoggar and a continuing object of Tuareg pilgrimage and ritual reference. The skeleton recovered in 1925–1927 was held at the Bardo Museum in Algiers; recent campaigns by the Algerian government and Kel Ahaggar institutions have proposed its return to the Hoggar and its reburial at the original monument.