Saint Hippolytus was a Christian martyr and theologian who lived in the early 3rd century. He is known for his writings, which include the "Refutation of All Heresies," where he defended orthodox Christian beliefs against various heresies of his time. Hippolytus is often recognized as one of the earliest Christian scholars and is considered a significant figure in the development of early Christian doctrine. He is commemorated on August 13 in the Roman Catholic Church and is also recognized by the Eastern Orthodox Church. Saint Hippolytus is often depicted in art with a book or scroll, symbolizing his contributions to Christian literature and theology. His legacy continues to influence Christian thought today.