This is the first Grand Seal of the city of Calais (c. 1228). The seal
depicts a bishop riding in a boat with his hand raised in making a blessing.
The inscription reads "s[igillum] totius ville de calais" (seal of the entire
city of Calais). This seal is catalogued as A1035 bis in the Archives Nationales
(Paris).
To view more images of municipal seals from Continental Europe, see the
page maintained by the
Library of the
Medieval Institute at Notre Dame.