In Daniel 9, the prince of the people that would destroy Jerusalem. Since J already lay in ruins in Dan's time, that could only be the Romans.
In 2 Thess.2, Paul writes of the "man of sin, son of perdition" entering the temple & proclaiming himself God.
2 Thess.2:3 Let no one deceive you by any means; for that Day will not come unless the falling away comes first, and the man of sin is revealed, the son of perdition, 4 who opposes and exalts himself above all that is called God or that is worshiped, so that he sits as God in the temple of God, showing himself that he is God.
Now, how can anyone say this is anything but a MAN? prets try to make him a symbol, as THE TRUTH opposes their false doctrine, but the Scripture is pretty plain. Continuing on in 2Thess.2:
5 Do you not remember that when I was still with you I told you these things? 6 And now you know what is restraining, that he may be revealed in his own time. 7 For the mystery of lawlessness is already at work; only He who now restrains will do so until He is taken out of the way. 8 And then the lawless one will be revealed, whom the Lord will consume with the breath of His mouth and destroy with the brightness of His coming. 9 The coming of the lawless one is according to the working of Satan, with all power, signs, and lying wonders, 10 and with all unrighteous deception among those who perish, because they did not receive the love of the truth, that they might be saved. 11 And for this reason God will send them strong delusion, that they should believe the lie, 12 that they all may be condemned who did not believe the truth but had pleasure in unrighteousness.
You may read Rev. 13 & rev. 17 for yourself, from your fave Bible version. They're both about the same beast, both the empire & its ruler.