A rare silica ceramic tile painted in Iznik, from the 16th century, a treasure belonging to the permanent collection of the Calouste Gulbenkian Foundation - was the basis for the creation of this set, honouring the art of tile making in Ottoman Turkey. Shell oriental Izmir. A rare silica ceramic tile painted in Iznik, from the 16th century, a treasure belonging to the permanent collection of the Calouste Gulbenkian Foundation - was the basis for the creation of this set, honouring the art of tile making in Ottoman Turkey.