Kelso Abbey is a ruined Scottish abbey in Kelso, Scotland. It was founded in the 12th century by a community of Tironensian monks first brought to Scotland in the reign of Alexander I. It occupies ground overlooking the confluence of the Tweed and Teviot waters, the site of what was once the Royal Burgh of Roxburgh and the intended southern centre for the developing Scottish kingdom at that time. Kelso thus became the seat of a pre-eminently powerful abbacy in the heart of the Scottish Borders.