Saint Ternan's Church is an Episcopal church near Muchalls in Aberdeenshire, Scotland.[1] The church was built in 1831 on land granted by the owners of Muchalls Castle. A very early Episcopal church had been constructed within Muchalls Castle itself in the first quarter of the 17th century. Earlier ruined Episcopal churches also exist slightly to the south on historical lands of Muchalls Castle. Saint Ternan's Church is situated along the ancient route of the Causey Mounth, which trackway was constructed in medieval times to make passable this only available route across the coastal region of the Grampian Mounth from points south from Stonehaven to Aberdeen. This ancient drovers' road specifically connected the River Dee crossing (where the present Bridge of Dee is situated) via Portlethen Moss, Muchalls Castle and Stonehaven to the south.[2] The route was that taken by William Keith, 7th Earl Marischal and the Marquess of Montrose when they led a Covenanter army of 9000 men in the first battle of the Civil War in 1639.[3]