The town wall with its four-cornered towers is pierced by nine gates, one, the Bab Bardain, with fine tile-work.
The church of the Holy Trinity (built in 1870) stands at the southern end of the rue d'Isly near the site of the demolished Fort Bab Azoun.
The length of its western side from Port Said to Aden is 1500 m.; its base from the Straits of Bab-el-Mandeb (or Bab al Mandab) to Ras el Had is 1300 m., its northern side from Port Said to the Euphrates 600 m.; its total area approximately 1,200,000 sq.
The principal streets of the city meet in the place du Gouvernement: the rue Bab Azoun (Gate of Grief) which runs parallel to the boulevard de la Republique; the rue Bab-el-Oued (River Gate) which goes north to the site of the old arsenal demolished in 'goo; the rue de la Marine which leads to the ancient harbour, and in which are the two principal mosques.
From the observations of salinity it is inferred that a surface current flows inwards to the Red Sea in the eastern channel of the Strait of Bab el-Mandeb, while a current of very salt water flows outward to the Indian Ocean, through the western channel, at a depth of 50 to loo fathoms from the surface.
The people of Niriz were stanch followers of the Bab (see BABIIs s), and rose against the government in 1850 and in 1852, with disastrous results.
Roman cemeteries existed near the rues Bab-el-Oued and Bab Azoun.
The island of Perim, a British possession, divides the strait into two channels, of which the eastern, known as the Bab Iskender (Alexander's Strait), is 2 m.
Wide in the Strait of Bab el-Mandeb; the eastern channel of the strait is 2 m.
During 1884, 1885, 1886 treaties guaranteeing British protection were concluded with various Somali tribes and in 1888 the limits of the British and French spheres were defined, all claims to British jurisdiction in the Gulf of Tajura and the islands of Musha and Bab being abandoned.