 On 29 May 1557, Philip signed a treaty in London with Lord Iacopo VI Appiani of Piombino.The lordship was restored to Iacopo, with Cosimo retaining the Elban fortress of Portoferraio and Philip reserving the right to garrison the cities of Piombino and Scarlino and fortifiy the island of Elba.With the conflict over Piombino resolved, on 3 July 1557 Siena and its "contado", less the coastal fortresses, were granted in fief to Cosimo, in return for which the duke cancelled all debts owed by Philip II or Charles.