In late 12th century and early 13th century, in the French regions dominated by the Kings of England from the dynasty of Plantagenêt, english coins circulated frequently along with local coins.
Here is a piggy bank which contained French and English coins dated 12th century, discovered rue Beauvoisine in Rouen in 1866.
This treasure must have been buried around 1200.
Glazed earthenware, silver
Musée départemental des antiquités, Rouen - Inv. 1029
For further details :
Pots de terre fragments d'histoire, published under the direction of Nathalie Roy, Rouen, Musée des Antiquités, 28 June-15 November 1999. N°10, p.28