1805 – Martello Tower, Sutton, Co. Dublin A Martello Tower along the coast converted into a residence. Dublin’s coastline has Martello towers at regular intervals as coastal defence.
1810 – Athlone Castle, Co. Westmeath Towards the end of the 12th century the Anglo-Normans constructed a motte-and-bailey fortification here. This was superceeded by a stone structure built in 1210,
1814 – Barrack Block, Tete-De-Pont, Shannonbridge, Co. Roscommon Tete-de-pont or bridge defences which were constructed during the Napoleonic Wars. The defences were designed to delay a military force approaching from the west from crossing the River Shannon to the eastern side.