Developed in keeping with Vanbrugh's original sketch dated 1720 and using a similar concept which he used at Castle Howard & Blenheim Palace, the dramatic Armoury Hall soars to 21 metres in height, the highest ceiling in Scotland.

Breathtaking displays of arms in elaborate patterns adorn the walls, including 16th and 17th century pole-arms and roundels of Brown Bess muskets dating from around 1740, with spandrels of muskets alternated with Lochaber axes. The latter and 18th century Scottish Broadswords date from the time of Queen Victoria's first visit to Inveraray in 1847. 

Situated centrally in this great hall, the showcases contain a fascinating collection of treasures associated with Inveraray and the Castle, which help illuminate the long and colourful history of the Campbell Clan. A highlight of the collection is the dirk and sporran belonging to Rob Roy MacGregor (1671-1734).