Iddo Island was an island opposite Lagos Island

Lagos Island

Lagos Island is the principal and central local government area of the Metropolitan Lagos in Nigeria. It is part of the Lagos Division. As of the preliminary 2006 Nigerian census, the LGA had a population of 209,437 in an area of 8.7 km²...

 in Nigeria

Nigeria

Nigeria , officially the Federal Republic of Nigeria, is a federal constitutional republic comprising 36 states and its Federal Capital Territory, Abuja. The country is located in West Africa and shares land borders with the Republic of Benin in the west, Chad and Cameroon in the east, and Niger in...

, but due to infill is now part of the mainland. Iddo Island is connected to Lagos Island by the Eko Bridge

Eko Bridge

Eko Bridge is the shortest of three bridges connecting Lagos Island, Lagos, Nigeria to the mainland, the other two being the Third Mainland and Carter bridges....

 and the Carter Bridge

Carter Bridge

The Carter Bridge built in 1901 is one of three bridges connecting Lagos Island, Lagos, Nigeria to the mainland, the other two being the Third Mainland and Eko bridges. At the time of its construction, this was the only bridge connection between the mainland and Lagos Island...

.

Lagos was founded by the Bini in the sixteenth century on the site of an earlier Yoruba

Yoruba people

The Yoruba people are one of the largest ethnic groups in West Africa. The majority of the Yoruba speak the Yoruba language...

settlement, and was known as Eko. The rulers of Lagos since then have all descended from the Benin warrior Ashipa who was the first king of the town, although the aristocracy are Yoruba. Ashipa's son built his palace on Lagos Island, and his grandson moved the seat of government to the palace from Iddo island.