Today is the day of the launch of the Wadden Sea Google Doodle !

https://www.google.com/doodles/celebrating-the-wadden-sea?hl=en-GB

I like it!

Connection: Assassinations

Kasbah of Algiers - Salim at-Toumi, the emir of the city of Algiers, was strangled in his bath in 1516 during the Capture of Algiers. The assassination was ordered by Oruç (or Arudj) Barbarossa, because Salim was conspiring with the Spaniards against him and the pirates. (Wiki)

Connection: Famous suicides

Kasbah of Algiers - Princess Zaphira loved her husband, emir Salim at-Toumi, so much that she poisoned herself not to marry Arudj Barbarossa after the assassination of her husband. (French wiki)

This connection needs to be updated:

Connection: Railways

Kasbah of Algiers - The Metro Station under the Place des Martyrs was inaugurated on 9 April 2018. (Wiki)

Connection: Sahara

M'Zab Valley - The M'Zab Valley is located within the limits of the Sahara desert, six hundred kilometers to the south of Algiers. (AB Ev)

Connection: Cemeteries (I think this classifies better under "Cemeteries" than under "Necropolises")

M'Zab Valley - Three unchanging elements are found in all 5 villages: the ksar, the cemetery and the palm grove with its summer "citadel". Outside the walls of the cities, the egalitarian idea reigns, as well, in the necropolises, where, among the nondistinctive graves, only the tombs of sages and the small mosques are distinguishable. (AB Ev)

I will update it but am in doubt whether this belongs to this connection at all. It is not part of the OUV and whether it is a notable construction is doubtable.

I can certainly agree on eliminating this connection. I just mentioned the update because the metro station had already been in use since 2018.

But I think that in that case, you should mention in the description that the railway has to add to the OUV of the site, and is not just merely present.

Are these two not noteworthy enough for addition to the Kasbah of Algiers?

Connection: Mausolea

M'Zab Valley - The M'Zab Valley counts several mausolea, e.g. for Sheikh Sidi Aissa in Melika and for Sheikh Ammi Brahim in El Atteuf. (French Wiki)

Connection: Legends and Folk Myths

M'Zab Valley - According to legend, Ghardaïa, means "Cave of Daïa" (Ghar Daïa); it is said that a young girl named Daïa lived alone in a cave. Sheikh Sidi Bou Gdemma passing by, was seduced by her beauty, they married and then founded Ghardaïa. (French Wiki)

Connection: Pyramids

M'Zab Valley - The minarets of the mosques have a pyramidal form, e.g. those in Ghardaïa and El Atteuf. (French Wiki)

Connection: Fortified religious buildings

M'Zab Valley - Each citadel has a fortress-like mosque, whose minaret served as a watchtower. (Wiki)

Connection: Pentapolis

Urbino - A Pentapolis including: Urbino, Cagli, Jesi, Gubbio and Fossombrone (French Wiki)

Connection: Trans Saharan trade routes

M'Zab Valley - From the 14th century, the M'zab region accentuated its role as a commercial caravan hub of Saharan Africa, around products such as wool, dates, salt, coal, weapons. (French Wiki)

Connection: Pastoralism

Tassili n'Ajjer - More recent paintings show cattle herders, which may have helped bring about the drier conditions in this part of the Sahara. (Ab Ev - IUCN)

Connection: Recorded cultural discoveries

Tassili n'Ajjer - It is the rock art (engravings and paintings) that have made Tassili world famous as from 1933, the date of its discovery. (Unesco) Tassili was already well known by the early 20th century, but Western eyes were fully introduced due to a series of sketches made by French legionnaires, specifically Lieutenant Brenans during the 1930s. He brought with him French archaeologist Henri Lhote, who would later return during 1956 - 1957, 1959, 1962, and 1970. (Wikipedia)

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Already existing, but adding a rationale:

Connection: Sandstone Formations

Tassili n'Ajjer - The property is also of great geological and aesthetic interest: the panorama of geological formations with "rock forests" of eroded sandstone resembles a strange lunar landscape. (Unesco)

Connection: Notable Trees

Tassili n'Ajjer - The Tassili Cypress only exists on the Tassili and is one of the oldest trees in the world after the Barbed Pine in the USA. (Rock Art of the Tassili n Ajjer)

Connection: Holocene

Tassili n'Ajjer - The transition to pastoralism following the African Humid period during the early Holocene is reflected in Tassili n'Ajjer's archaeological material record, rock art, and zooarchaeology. (Wikipedia)

Connection: Tumuli

Tassili n'Ajjer - The lowlands have stone tumuli and hearths dating between 6000 to 4000 BCE. (Wikipedia)

Connection: Shamanism

Tassili n'Ajjer - Among the rock paintings, there are depictions of ritual figures or shamans. (Wikipedia)

Connection: Berbers

Tassili n'Ajjer - The rock art includes Libyc and Tifinagh inscriptions (ancient and recent Tuareg/Berber script). The artists of the Horse Period art were ancestral Berbers, some of whose descendants are the modern Tuareg.(Rock Art of the Tassili n Ajjer)

Connection: Erich von Däniken

Tassili n'Ajjer - Many Round Head paintings portray 'strange' people with round, featureless heads and formless bodies. Erich von Däniken controversially described these paintings in his 1968 book "Chariots of the Gods?" as representing prehistoric, extra-terrestrial astronauts who had somehow influenced human evolution. (Rock Art of the Tassili n Ajjer)

Connection: Erotic art

Tassili n'Ajjer - Some scenes appear to portray sexuality, e.g. men with an erect penis. (Rock Art of the Tassili n Ajjer)

Connection: Chariots

Tassili n'Ajjer - The paintings and engravings of the Horse Period commonly depict horses and horse-drawn chariots. (Rock Art of the Tassili n Ajjer)

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Already existing, but adding a rationale:

Connection: Neolithic age

Tassili n'Ajjer - The site of Tassili was primarily occupied during the Neolithic period by transhumant pastoralist groups whose lifestyle benefitted both humans and livestock. There are numerous rock shelters within the sandstone forests, strewn with Neolithic artifacts including ceramic pots and potsherds, lithic arrowheads, bowls and grinders, beads, and jewelry. (Wikipedia)

Extending the rationale:

Connection: Pastoralism

Tassili n'Ajjer - The site of Tassili was primarily occupied during the Neolithic period by transhumant pastoralist groups whose lifestyle benefitted both humans and livestock. The transition to pastoralism following the African Humid period during the early Holocene is reflected in Tassili n'Ajjer's archaeological material record, rock art, and zooarchaeology. Cattle were herded across vast areas as early as 3000-2000 BCE, reflecting the origins and spread of Pastoralism in the area. (Wikipedia) More recent paintings show cattle herders, which may have helped bring about the drier conditions in this part of the Sahara. (Ab Ev - IUCN)

Connection: Dubbed as another WHS

Tassili n'Ajjer - The Oued Djerat has been dubbed the "Vézère of the Sahara" because of its big naturalistic engravings. (Wiki - Gravures rupestres de l'Oued Djerat)