The English Curtain was part of the original defence wall built around Valetta by the Knights of St John. This section of the wall runs from the French Curtain round to St Sebastian Bastion. The straight face of this curtain faces directly towards the open sea between Fort Tigne and Fort St Angelo. It was therefore considered an important coast battery to defend the entrance to Marsamxett Harbour which lies around Manoel Island.
It is assumed that during the Knights period smooth bore guns were mounted along this front, but work commenced in September 1867 to upgrade this with modern works. It is reported that this work was not completed until March 1876, some nine years later. The budget for this construction is shown as £1,537 but it was completed for £1,376. Surviving plans held by the National Archives show that the front had the following armament:











