It would be hard if not outright impossible to overstate the impact Roman Emperor Constantine I had on the history of Christianity, Ancient Rome, and Europe as a whole. Best known as Constantine the Great, the kind of moniker only earned by rulers who have distinguished themselves in battle and conquest, Constantine remains an influential and controversial figure to this day. He achieved enduring fame by being the first Roman emperor to personally convert to Christianity.

The Holy Grail is one of the most famous relics of Christianity, but also one of the least understood. Today, it is mostly associated with Christ's Last Supper, possibly used during the meal as a serving cup. The gospels in the New Testament specifically mention the Holy Chalice that Jesus used to serve wine, so it's no surprise that images of the Holy Grail depict a similar kind of cup.

With the possible exception of Dr. Martin Luther King, Jr., no African American has been more instrumental in the fight for minorities' civil rights in the United States than Frederick Douglass (1818 - 1895), an American social reformer, orator, writer, and statesman. His list of accomplishments would be impressive enough even without taking into account the fact that he was born into slavery.

J. D. Salinger might have been one of America's greatest 20th century authors, but only he knows for sure. As a young adult, Salinger wrote a number of short stories that were published during the 1940s in Story Magazine and his story "A Perfect Day for Bananafish" appeared in The New Yorker magazine to wide praise. Salinger followed that up with his most famous work, the 1951 novel The Catcher in the Rye, which was popular among adults and adolescents alike.

Next to Joseph Smith, Brigham Young is one of the best known Mormon leaders and perhaps the most important. After Smith's death, it was Young who led Mormon pioneers westward in a journey that the Latter Day Saints often likened to the Exodus, and Young became popular as "American Moses". At the same time, Young and his group were involved in a seemingly never ending list of controversies, both of their own making and the misconceptions of so many Americans who were unfamiliar with the religion.