A statue of St. Patrick on the Hill of Slane in Ireland.

President Obama is sworn in at the Inauguration.

Thomas Aquinas began the Thomistic school of philosophy, which was long the primary philosophical approach of the Roman Catholic Church.

John Wesley (1703?1791), an 18th-century English clergyman and Christian theologian who founded the Methodist movement of Protestantism. Wesley organized the Methodist church into groups, as he firmly believed that Christian growth depended on community.

Augustine of Hippo (354?430), the theological fountainhead of the Reformation teaching on salvation and grace. This painting was done by Sandro Botticelli c. 1449.

A celebratory parade held for the succesful mission of Apollo 11. August 13, 1969, Manhatten, New York.

Barack Obama, the first African-American President of the United States.

Astronaut Buzz Aldrin walks on the moon.

From left, Commander Neil Armstrong, Command Module Pilot Michael Collins, and Lunar Module Pilot Edwin 'Buzz' Aldrin.