Mongavlin Castle

Mongavlin Castle is ruined castle on the River Foyle, south of St Johnston, County Donegal, Ireland.

It was once a stronghold of the O'Donnell's, Lords of Tyrconnell.

References

• http://stjohnstonandcarrigans.com/mongavlin-longarticle.htm
• http://stjohnstonandcarrigans.com/mongavlinarticle.html