- france.fr en/article/chateau-if-0The Château d'If, the famous island fort facing Marseille immortalised by Alexander Dumas in The Count of Monte Cristo.
- http://prisonhistory.net famous-prisons/chateau-dif-…After serving as a prison for more than a century, Château d'If was finally demilitarized and transformed to a public tourist attraction on September 23, 1890.
- britannica.com place/Chateau-dIfOther articles where Château d′If is discussed: If: Its castle, built by the French king Francis I in 1524, was later used as a state prison.
- historyhit.com locations/chateau-dif/Château d’If is a fortress and former prison located on the Île d’If, the smallest island in the Frioul archipelago, situated offshore from Marseille in France.
- 2homes2worlds.com 2018/08/17/chateau-dif/Château d’If – history and legends. Marseille is protected from the sea by four islands of the Frioul archipelago, located near the shore.
- ba-bamail.com content.aspx?emailid=14096The famous Château d'If began as a formidable fortress, built as a defensive post in 1524 on the small island of If.
- travel.usnews.com Marseille_France/Things_To_Do/…Château d'If is a 16th-century fortress, commissioned by King Francois I, set atop the smallest island in the Frioul archipelago less than a mile from Marseille.
- commons.wikimedia.org wiki/Category:Château_d'If
- itinari.com location/chateau-d-if-in-marseilleChâteau d'If. Address: Embarcadère Frioul If, 1 Quai de la Fraternité, 13001 Marseille, France. ... Places to visit around Château d'If.
- headout.com chateau-d-if-marseille-tours/chateau-…But the Château d’If was actually built for other noble reasons, the priority of which was given to the safety of Marseilles.