A naval station was first set up here around 1840 to house reserve fleet vessels and their crews (totalling nearly 200 sailors), and it was visited by Napoleon III and empress Eugénie during their August 1858 trip into Brittany.
It existed from its foundation at Landévennec, traditionally by Winwaloe in the late fifth century, to 1793, when the monastery was abandoned and sold.
According to his hagiographic Life, completed in 884 by a Breton monk named Wrmonoc of Landévennec Abbey, Paul was the son of a Welsh chieftain named Perphirius/Porphyrius ("clad in purple"), from Penychen in Glamorgan.
The parish saint disguised under the name 'Tewennocus' is almost certainly St Winwalo (pet-form: Winnoc), also commemorated at Gunwalloe and Landewednack, as well as Landevennec, Brittany: the place-name being derived from Old Cornish "te-Winnoc" (thy St Winnoc Winwalo), now represented as Late Cornish Te Wydnek.