Sixteen-arch road bridge, completed in 1757, spanning the River Shannon. Concrete fixed span added to east end in 1983. Random coursed limestone walls with ashlar voussoirs to round-headed arch-ring...

Tete-de-pont with glacis, redoubts and caponniere, constructed in 1810, with barracks added in 1814. Completed in 1817. Random coursed stone ramparts with cut stone quoins, built to a triangular pla...