If you do not believe that this verse applies to the Roman Catholic Church, read Foxe's Book of Martyrs. The Roman Catholic Church killed more Christians during the Protestant Reformation than the Roman Empire did during the early days of the church.
Satan expressed his authority through the old Roman Empire, which severely persecuted the early Christians. When the Antichrist comes to power, Satan will give him his full power and authority to express him in persecuting God's people and worshiping Satan through the worship of the Antichrist. In all these years since the end of the Roman Empire, what has served Satan as his expression and provided him with worshipers? None other than the Roman Catholic Church!