Medieval art covers a vast scope of time and place, over 1000 years of art history in Europe, the Middle East and North Africa. It includes major art movements and periods, national and regional art, genres, revivals, the artists crafts, and the artists themselves. Art historians classify medieval art into major periods and movements. They are Early Christian art, Migration Period art, Celtic art, Pre-Romanesque and Romanesque art, Gothic art, Byzantine art and Islamic art. In addition each "nation" or culture in the middle Ages had its own distinct artistic style and these are looked at individually, such as Anglo-Saxon art or Viking art. Medieval art includes many mediums, and was especially strong in sculpture, illuminated manuscripts and mosaics. There were many unique genres of art, such as Crusade art or animal style.