Margat Castle in Syria, an illustration from Guillaume Rey's book Étude sur les monuments de l'architecture militaire des croisés en Syrie et dans l'île de Chypre (1871). The castle belonged to the Hospitaller Knights in the 12th-13th centuries, and it was built of black basalt stone with some white decorative elements obtained by using limestone (the black tower and the walls with decorative white stripes are visible in the desaturated area of the picture). This black and white decoration pattern can be traced also in Belvoir Castle, now in ruins, another stronghold of the Hospitaller Knights in the Holy Land, and, therefore, some scholars associate it with the colours of the Hospitaller Order in these times – black and white, as some kind of the manifestation of military might by decorating castles with the colours of the Order.