The Cathedral of St. Mary the Great is a catholic church and fortress built in the fifteenth century, which preserves a Romanesque appearance.
Its facade is flanked by two large towers topped by battlements and highlights its beautiful Gothic portal with archivolts with sculpted scenes from the Passion of Christ and sculptures of the Apostles. It is a Romanesque church with a Latin cross and inside is separated by three arches supported on pillars ships. It is classified as Imóvel of Public Interesse.
Inside, are the chapels of St. Bernard (by Fernão Brandão) and the chapel of the Blessed Sacrament, attributed to stonemason, João Lopes the 'old'.
References:Doune Castle was originally built in the thirteenth century, then probably damaged in the Scottish Wars of Independence, before being rebuilt in its present form in the late 14th century by Robert Stewart, Duke of Albany (c. 1340–1420), the son of King Robert II of Scots, and Regent of Scotland from 1388 until his death. Duke Robert"s stronghold has survived relatively unchanged and complete, and the whole castle was traditionally thought of as the result of a single period of construction at this time. The castle passed to the crown in 1425, when Albany"s son was executed, and was used as a royal hunting lodge and dower house.
In the later 16th century, Doune became the property of the Earls of Moray. The castle saw military action during the Wars of the Three Kingdoms and Glencairn"s rising in the mid-17th century, and during the Jacobite risings of the late 17th century and 18th century.