Tamentfoust (Arabic: تمنتفوست), the classical Rusguniae and colonial La Pérouse, is a site in the Dar El Beïda District of Algiers in Algeria.

Tamentfoust port
Shown within Algeria
Alternative nameRusguniae
La Pérouse
RegionAlgiers Province
Coordinates36.75°N 5.066667°E / 36.75; 5.066667
Cap Matifou Lighthouse
Coordinates36°48′42.2″N 3°14′43.29″E
Foundationmasonry base
Constructionmasonry tower
Tower height6 metres (20 ft)
Tower shapequadrangular tower with balcony and light attached to 1-storey keeper’s house
Markingswhite tower
OperatorOffice Nationale de Signalisation Maritime
Focal height74 metres (243 ft)[1]
Light sourcemain power
Range23 nautical miles (43 km; 26 mi)[1]
CharacteristicFl (3) W 15s.[1]
Admiralty no.E6594
NGA no.22368
ARLHS no.ALG-014[2]