chambers are separated by a short passage, and are cut off from the gallery by stone doors made of a single slab which can be moved up and down by levers, like a portcullis. The larger of the two chambers is long by broad and high. The other chamber is somewhat smaller. The tomb was previously looted, probably in search of treasure. In 1555, Salah Rais, pasha of Algiers, set men to work to pull it down, but the records say that the attempt was given up because big black wasps came from under the stones and stung them to death. At the end of the 18th century, Baba Mahommed tried in vain to batter down the tomb with artillery. In 1866 it was explored by order of the emperor Napoleon III, the work being carried out by Adrien Berbrugger and Oscar Maccarthy. The Jedars The Jedars (Arabic "walls" or "buildings") is the name given to a number of sepulchral monuments placed on hill-tops. A rectangular or square podium is in each case surmounted by a pyramid. The tombs date from the 5th to the 7th century of the Christian era, and lie in two distinct groups between Tiaret and Frenda. Frenda, which has largely preserved its old Berber character, has numerous dolmens and prehistoric rock sculptures close by. Tassili n'Ajjer Tassili n'Ajjer is a national park in the Sahara desert, located on a vast plateau in south-east Algeria, covering an area of over . It has one of the most important groupings of prehistoric cave art in the world, and was inducted into UNESCO's World Heritage Site list in 1982. Tassili n'Ajjer is known in the New Age culture for its Fungoid rock art, the primitive yet elaborate drawings of psychedelic mushrooms that hints on a shamanic consumption of those plants by the native people of this land. Other sites Lambessa Tebessa Tipasa Timgad (the Pompeii of Africa) Thubursicum (Thubursicum): Well-preserved Roman theater Beni Hammad Fort (contains second oldest minaret in the country) Recent discoveries In 2009, when the Place des Martyrs in Algiers was closed to build the subway station, Algerian and French archeologists found a 5th-century (Christian) basilica below layers of concrete. In November 2018, archeologists in Algeria announced the discovery, on the site of Ain Boucherit near Sétif, of what seems to be stone tools (similar to Oldowans) and cut animal bones dated back to 2.4