Following the Roman occupation of the peninsula a steady flow of uncouth northerners began to appear. Under the names of Sarmatians, Goths of various sorts, Huns, Bulgarians to whom the Byzantines gave their appellation because they came from the banks of the Volga, and Avars, they spread havoc far beyond the western limits of the Adriatic. These barbarians were followed by Slavs. The eastbound journeys of the Crusaders next intervene; then a final mighty onslaught of Turkish hordes whose savage fury seemed for a moment to obliterate the laboriously-reared western civilization. To this bewildering succession of human types the extraordinary complexity of stock characterizing the present population of the peninsula is directly ascribable, each race or people having left some trace of its passage. The compilation of an ethnographical map of the region results in the representation of the most mosaic-like surface imaginable. Nor are the actual evidences of these ancient invasions lacking to the observant eye. Take, for instance, the fair-haired, blue-eyed Greeks, totally devoid of traces of nigrescence, who are by no means uncommon in Macedonia.[179] In them the Nordic type, due in part to the Achæan conquerors, has survived. To this day the tourist, wandering in any town formerly occupied by the Turks, may suddenly behold in the streets as pure a Mongolian type as is to be found on the highlands of western central China. In the Bosnian town of Sarajevo, as in the Macedonian villages north of the Ægean, the ugly features of these Asiatics often reveal but too plainly their origin.