Pope Alexander I was the second pope of the Roman Catholic Church, serving from around 106 to 115 AD. He is often associated with the early development of Christian practices and is believed to have introduced certain rituals, such as the use of the sign of the cross. His papacy occurred during a time of significant growth for Christianity, as it began to spread throughout the Roman Empire. Traditionally, Pope Alexander I is credited with the establishment of the Roman Catholic Church's structure and governance. He is also recognized as a martyr, although historical details about his life and death are scarce. His feast day is celebrated on May 3rd in the Christian liturgical calendar.