The main materials used for construction were rammed earth (or pisé) and brick, of which most walls were made, as well as marble, plaster, and tile used for decoration. Ancient Roman and more recent Saadian spolia (especially marble) were looted from other sites in Morocco wherever available (such as Volubilis and the Badi Palace) and reused for the palaces.[1][2][24]:193 The decorative motifs on display are in keeping with the existing artistic traditions of Moroccan architecture, which had by this point been fused with earlier Andalusi (Moorish) architecture.[21][4][5]