It could indeed, in a modified role which I will explain using the example of Dover Castle, local to me. Dover was a powerful castle built in the late 11rth century, which withstood several major French sieges. Built on the hill overlooking Dover with a central keep and outer concentric walls, Dover was, like other Medieval works, left behind by the development of effective gunpowder artillery which rendered high stone walls highly vulnerable, causing Dover castle to fall into disrepair. Dover port however did not lose its tactical importance in the following 16th, 17th and 18th centuries: As the closest coastline to the continent, Dover was vulnerable to seaborne assault from France and would be a vital prize as tensions with the French deteriorated over the following centuries . Armies were now too larger to simply roll up to any suitable coastline, and a port like Dover would be vital to any French invasion force. As Dover Castle dominated the heights above the port, converting it into an effective modern artillery fortress was vital, and engineers set about rebuilding the castle.

The adaptions were numerous. To protect the vulnerable high walls, great ditches were dug and the earth piled into high embankments all around the castle to give protection from cannon fire and infantry assault, and caponiers (covered galleries allowing defenders to enfilade fire down the length of the ditches with musketry or carronades) were built or adapted from existing outworks of the castle. The walls themselves were lowered to reduce vulnerability to cannon fire and the battlements and loops originally designed for arrow weapons were adapted for musketry. Gun positions were built to the south consisting of cannons mounted behind stout earth embankments. The scale of these adaptions shows you the great resourcefulness of the engineers responsible. With large scale modifications even an outdated defensive work could be brought up to at an acceptable standard. Dover brought with it other advantages: the large areas inside the old baileys allowed for plenty of storage space to be built, foreshadowing Dover's future secondary role as an important store for arms and materiel.

Dover expanded and adapted even more in the following centuries as its role changed further. Huge underground tunnel networks were dug to accommodate its garrison as invasion scares threatened in the 19th century. Older cannons were replaced or supplemented by more modern Rifled Muzzle Loading guns and later breech-loaders. Some of these gun positions would later be converted into fire control and command positions as telegraphy allowed Dover to become the center for the defense of the Port of Dover from enemy naval attack. Centralized fire direction from the castle could be used to call down gunfire from batteries arranged along the coast, even when said battery could not even see what it was shooting at, thanks to firing data being transmitted electronically. It would remain in this role throughout the First and Second World Wars, as well as mounting anti-aircraft guns during the Second World War. After the underground barracks were condemned as bad for health, they were expanded to become firstly storage space for munitions, and later a nerve center for military command of the South East in both world wars, with the evacuation of Dunkirk being organized in the tunnels below the castle. Dover's military role would continue into the Cold War, when the Lowest tunnel galleries were adapted into a Regional Seat of Government bunker for the organization of the South East in the aftermath of a nuclear attack on the UK.