Senglea is a fortified city

City

A city is a relatively large and permanent settlement. Although there is no agreement on how a city is distinguished from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.For example, in the U.S...

 in the east of Malta

Malta

Malta , officially known as the Republic of Malta , is a Southern European country consisting of an archipelago situated in the centre of the Mediterranean, south of Sicily, east of Tunisia and north of Libya, with Gibraltar to the west and Alexandria to the east.Malta covers just over in...

, mainly in the Grand Harbour

Grand Harbour

Grand Harbour is a natural harbour on the island of Malta. It has been used as a harbour since at least Phoenician times...

 area. It is one of the Three Cities

Three Cities

The Three Cities is a collective description of the three fortified cities of Cospicua, Vittoriosa, and Senglea on the Island of Malta, which are enclosed by the massive line of fortification created by the Knights of St John, the Cottonera Lines....

 in the east of Malta, the other two being Cospicua

Cospicua

Ċittà Cottonera, Ċittà Cospicua, Cospicua is a double-fortified harbour city on the Mediterranean island of Malta. It is the largest of the Three Cities. It was also given a title as Citta' Cottonera, but erroneously the title is now used to define the whole region...

 and Vittoriosa. The city of Senglea is also called Civitas Invicta, because it managed to resist the Ottoman

Ottoman Empire

The Ottoman EmpireIt was usually referred to as the "Ottoman Empire", the "Turkish Empire", the "Ottoman Caliphate" or more commonly "Turkey" by its contemporaries...

 invasion at the Great Siege of 1565

Siege of Malta (1565)

The Siege of Malta took place in 1565 when the Ottoman Empire invaded the island, then held by the Knights Hospitaller .The Knights, together with between 4-5,000 Maltese men,...

. The proper name is Senglea since the grandmaster who built it Claude De La Sengle, gave this city a part of his name.
The island on which Senglea lies was joined by a land bridge to Cospicua during the time of the Knights of St.