Looking out across the sheltered waters of the Fal estuary to Pendennis Castle and beyond to the open sea, St Mawes Castle is witness to over 450 years of history. This unique clover leaf shaped castle was built on the orders of Henry VIII when invasion from France and Spain was feared in the mid 16th century. Although built as an artillery fort, the castle nevertheless had a great deal of care lavished on the quality of the masonry and the detail of the stonework.