Sunday worship goes back to the time of the Apostles, according to scholar Gary Habermas, not hundreds of years.
It goes back a long time but only because the Catholic church outlawed the true Sabbath. Three hundred plus years after the death of Christ at the council of Laodecia they made it formal:
The Council of Laodicea states in canon 29:
Christians must not judaize by resting on the Sabbath, but must work on that day, rather honouring the Lord's Day; and, if they can, resting then as Christians. But if any shall be found to be judaizers, let them be anathema from Christ.
So after this point it was very dangerous to worship on the biblical Sabbath. You would be bucking the Roman government as well as it's state sponsored religion. The original system that composed the beast and false prophet.