Most Christians worship on a regular basis on the Lord's Day. They have done so from the beginning, and their worship has centered on the Eucharist, following Jesus's words, "Do this in remembrance of me." Over the two millennia of the Christian tradition there have been shifts of emphasis and understanding about the Eucharist. This book attempts to point out, by providing accessible accounts of both liturgies and liturgists across the centuries and traditions, just how much different Christians have in common and how they can benefit from attending to one another's worship. The author's ultimate hope is that in its small way, the book will contribute to Christians worshiping together.