Rome was 6th
The one that is.
There are 4 world kingdoms according to Daniel 2.
Babylon
Persia
Greece
Rome
Rome is in two parts typified by the two legs and feet.
Rome in the days of Jesus
Rome in these last days
You, O king, were watching; and behold, a great image! This great image, whose splendor was excellent, stood before you; and its form was awesome. This image’s head was of fine gold, its chest and arms of silver, its belly and thighs of bronze, its legs of iron, its feet partly of iron and partly of clay. You watched while a stone was cut out without hands, which struck the image on its feet of iron and clay, and broke them in pieces.
Then the iron, the clay, the bronze, the silver, and the gold were crushed together, and became like chaff from the summer threshing floors; the wind carried them away so that no trace of them was found. And the stone that struck the image became a great mountain and filled the whole earth. Daniel 2:31-35