In the early days of the Roman Empire, Sunday was not considered a special day of worship. However, it was Emperor Constantine the Great who officially made Sunday a religious holiday in the year 321 AD. Constantine was a key figure in the history of Christianity, as he was the first Roman Emperor to convert to Christianity and played a crucial role in the legalization of the religion throughout the Empire.

Constantine's decision to make Sunday a day of rest and worship was influenced by his own conversion to Christianity. In his famous Edict of Milan, Constantine declared religious tolerance for all faiths, but he also favored Christianity and encouraged its growth. By establishing Sunday as a day of rest and worship, Constantine sought to honor the Christian belief in the resurrection of Jesus on a Sunday and to set Christianity apart from traditional Roman pagan practices.

Today, Sunday remains a day of religious significance for many Christians around the world, with regular church services and gatherings taking place on this day. The observance of Sunday as a day of rest and worship can be traced back to the decree of Emperor Constantine over a thousand years ago.

To learn more about the history of Sunday as a religious holiday and the role of Emperor Constantine in shaping Christian practices, you can visit history.com for in-depth articles and resources. Additionally, britannica.com provides detailed information on Emperor Constantine and his impact on the Roman Empire and Christianity.

Overall, Emperor Constantine the Great's decision to make Sunday a religious holiday was a significant moment in the history of Christianity and has had a lasting impact on the way Christians around the world observe and celebrate their faith.

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