Evidence of early medieval habitation at Mawgan is in the form of an inscribed pillar stone, located at the meeting of three roads at the centre of the village; it bears an inscription that is no longer readable, but based on an old drawing and a photograph taken in 1936 it could have been a memorial stone to either 'Cnegumus son of Genaius' or 'Genaius son of Cnegumus'.
[3] The parish church is dedicated to St Mauganus, a Welshman, and he is also honoured at Mawgan in Pydar and in Wales and Brittany.
[4] The church is a Grade I Listed building and its surviving fabric dates from the 13th century onwards.
[5] The church was described in the Cornishman newspaper as "an old and dilapidated structure" following a storm, when the porch and the south aisle lost much of their roofing on 29 April 1882.
[5] Other than the font, the church also contains a 14th century sepulchre to the Carminow Family and the mausoleum of Richard Vyvyan 1st Baronet (d.1665).