A castle has stood on the site of Delgatie Castle since the year 1030 AD, although the earliest parts of the castle standing today were built between 1570 and 1579. Additional wings and a chapel were added in 1743. The castle was stripped from the disgraced Henry de Beaumont, Earl of Buchan after the Battle of Bannockburn in 1314 and given to Clan Hay (later to become the Earls of Erroll). Mary, Queen of Scots, was a guest at the castle in 1562 after the Battle of Corrichie.