Sherd from a 18th century archaeological context in Britanny (France). Dense decoration including foliage and flowers, dots or groups of dots, and a little butterfly. A mark "IVL 14" is showing on the other side.
According to this website, the mark IVL might refer to Johannes van Lockhorst from the workshop De Klaauw (1713-1740), although I found another identification in Henry-Pierre Fourest's "La faïence de Delft" (1980), indicating that such a mark could refer to Jansz Van der Laan (T'Hart and De 3 Klokken, late 18th century). From the decoration, I think your identification might be more accurate. Could you help me identifying this mark ?