Did Jesus exist? What's the real date of Christmas? Was the Last Supper really at the Cenacle? Christian scholar, David Christian Clausen, provides archaeological evidence that covers these mysteries of Jesus Christ. David discusses his new book 'The Upper Room and Tomb of David: The History, Art and Archaeology of the Cenacle on Mount Zion.' The subject of intense speculation by both scholars and the faithful, the Cenacle on Mount Zion--also known as the Upper Room of the New Testament gospels and as the Tomb of David--has remained a mystery for centuries. Jesus is said to have dined there. James, his brother, is believed to have been interred there. King David may be buried beneath its floor. Claimed by Jews, Christians and Muslims, the sacred structure continues to evoke passionate controversy. David Christian Clausen share his opinions on lingering mysteries about the Cenacle: Does it date back to the time of Christ? Was the Last Supper celebrated there? Is this the place where the Holy Spirit descended on the apostles on the first Pentecost following Easter Sunday? Did King David's remains ever lie there? These and many other questions are explored reveaklng the truth about the Cenacle's history, archaeology and imagery over the past 1,500 years.