Aros Castle, is a ruined 13th-century castle located near Salen, Isle of Mull, Scotland (Scottish Gaelic: An t-Sàilean, An t-Eilean Muileach, Alba). It is thought to have been built by one of the Clan MacDougall Lords of Lorn and was once a stronghold of the Lords of the Isles. The castle was defended on the seaward side by low cliffs, and originally by a ditch on the inland side. When Aros Castle was forfeited it went from the MacDougall's to the Clan Donald. In the end they lost the castle to the Clan Maclean. The castle was reported to have been in a ruinous state since the last 1600's.
The Isle of Mull (Scottish Gaelic An t-Eilean Muileach) is the second-largest island of the Inner Hebrides (Scottish Gaelic: Na h-Eileanan a-staigh). There is archaeological evidence that Mull (Scottish Gaelic: Muile) has been inhabited since shortly after the end of the last Ice Age, around 11,000 years ago. In the 6th century AD it was part of the Gaelic kingdom of Dál Riata and later Cenél Loairn. In the 9th century the Viking invasions led to the establishment of the Norse - Gael Kingdom of the Isles also known as Kingdom of Mann and the Isles. After the 1266 Treaty of Perth they were brought into the expanding Kingdom of Scotland.