The first dwellings, which date back to the 18th century, were behind the Spanish fortification lines drawn up during the Sieges of Gibraltar which took place during the 18c and 19c wars in Europe.

La Linea was, and still is, a supplier of fresh produce from its open and fertile land area as well as its population supplying workers, mainly for the Gibraltar Dockyard.

This provision stopped with the total closure of the border by the Spanish government between 9 June 1969 [2] and 15 December 1982 [3] as a result of the dispute between Spain and Britain regarding the sovereignty of Gibraltar.

[4] La Línea is a major supplier of fruit and vegetables to Gibraltar; other industries include the manufacture of cork, liquor, and fish paste.

'The Line') derives its name from the 'Line of Contravallation' (La Línea de Contravalación) defence structure built after the 1727 siege on Gibraltar.

[6] In 1883, it was first recorded under the official name of 'La Línea de la Concepción' (a reference to the Immaculate Conception, the then patron of the Spanish Army).

Austria, England, and the Netherlands feared a possible alliance and/or a hypothetical union between the French and Spanish royal houses, and so favoured the Habsburg Charles.

[citation needed] The Grand Alliance[8][9] captured Gibraltar on 3 August 1704 during the War of the Spanish Succession after abortive attempts elsewhere.

[14] After order was restored,[15][16] despite the surrender agreement promising property and religious rights,[17] most of the population left with the garrison on 7 August citing loyalty to Philip.

[18] Several factors influenced the decision including the expectation of a counter attack[19] and the violence[20] during the capture, which ultimately proved disastrous for the Hapsburg cause.

[21] The subsequent siege failed to dislodge the Hapsburg forces and the refugees settled around Algeciras and the hermitage of San Roque.

However, to monitor the isthmus and to oppose a possible invasion of the rest of the territory, a permanent garrison was established in the area, under the military government of Campo de Gibraltar.

Between these two strongholds a large wall was built with central square tip diamond shaped bulwarks with their respective bodies, running from Santa Bárbara to San Felipe.

[citation needed] Thus, La Línea originated from a provisional camp made by artisans and merchants who supplied the military and their families in the vicinity of the fortifications erected to besiege Gibraltar.

After the destruction of the physical line that blocked the passage through the isthmus, the city continued to grow with a strong dependence on Gibraltar, covering all sorts of services to Gibraltar (supply of food, meat, fruit, vegetables and physical space for housing nearby and a labor force in the service of an expanding port, etc.).

In due time, traders, merchants and workers wanted the simple line of buildings to become an independent municipality of San Roque, controlled by the military, landowners and aristocrats.

Properly speaking, La Atunara or Tunara, should not be considered as a contemporary part of the line because its origins date back to some 640 years before the city itself.

On 20 July 1870 La Línea got its first mayor, Lutgardo López Muñoz, chosen by a committee of residents appointed by the provincial council.

In November 2017, Apymell collective of small businesses started accepting Pound sterling as a currency for payment in the town.

The Supreme Court sentenced that the measure "affects the territorial organization of the State and of the Autonomous Communities, an extremely delicate matter in which any alteration goes beyond purely local interests", thereby bringing down the initiative.

At the top of the building, there was always a bundle of dry wood to be burned immediately in case of danger, transmitting the alarm signal to the towers nearby.

It is considered to be one of the oldest buildings in La Línea along with the former Military Command, now the Museo del Istmo [1], which are good examples of architecture in Andalusia in the late 19th century.

Luis Ramírez Galuzo was undoubtedly one of the neighbors of the city with more economic means of the century, and the mayor on several occasions, submitted to the council for permission to build on own property, a bullring, to celebrate the Spanish festival, other festivals such as acrobatic, and other celebrations in the year 1880, the project being led by the provincial architect Adolfo del Castillo, author among other works, of the Abastos market, today Concepción market and the former Municipal Slaughterhouse now disappeared.

Inside the parish church of the Immaculate Conception there are images of Jesús del Gran Poder, and others belonging to four religious guilds.

The Three Graces is a Monument at the Plaza de la Iglesia that is based on the Greek mythology of the three Charites, which represent charm, beauty, and creativity.

It is a historical monument dedicated to the figure of the famous flamenco singer José Monge Cruz, Camarón de la Isla, who lived much of his life in this city.

On the underground parking just below the extension of the Conservatory, archaeological remains of the 18th century Contravalación line were found and are now displayed nearby.

With thousands of photographs, bullfight posters, marking irons, torero costumes, trophies, capes, flags, stocks, etc.. With over 50 years of history, it can be considered one of the most important ones in the country.