There is little historical evidence pertaining to the period when the city was founded. Scattered Slavic settlements existed in the area from the 6th century, but it is unclear whether any of them later developed into the city. On the Ptolemy world map there are several settlements indicated along the mid-stream of Borysthenes, among which is Azagarium, which some historians believe to be the predecessor to Kyiv. However, according to the 1773 "Dictionary of Ancient Geography" of Alexander Macbean, that settlement corresponds to the modern city of Chernobyl. Just south of Azagarium, there is another settlement, Amadoca, which is supposed as the capital of Amadoci people living in area between marshes of Amadoca in the west and Amadoca mountains in the east.