Enniskillen has the unique honour of being the only town in Great Britain and Ireland to give its name to two regiments, the Royal Inniskilling Fusiliers and the 5^th Royal Inniskilling Dragoon Guards, now part of the Royal Irish Regiment and the Royal Dragoon Guards respectively. The Castle was the birthplace of these regiments more than 330 years ago.

The Inniskillings Museum galleries house a rich collection of personal treasures and battlefield curios, weapons and army vehicles, medals and uniforms, art and musical instruments, regimental silver and trophies.