This is the last remaining Lime Kiln that has survived in Gibraltar. It appears that this type of Lime Kiln must have abounded in Gibraltar as there is even a street named after them, proof of their usefulness to the local community.
These 'kilns' or ovens were used to produce lime for which were a variety of uses. Lime was used to whitewash buildings, to paint water cisterns so that the water was free of bacteria and perhaps most importantly in times of plague, to pour over dead bodies in mass graves to prevent further spread of disease.
This particular lime kiln is estimated to date back to the late 19th or early 20th Century and the heat resistant bricks were made in England.