Pope Telesphorus was the 9th pope of the Roman Catholic Church, serving from around 125 to 136 AD. He is recognized for his role in the early Christian community and is believed to have been a Greek by birth. Telesphorus is often credited with establishing certain liturgical practices, including the celebration of Christmas. He is also noted for his martyrdom, which is commemorated in the Catholic Church. Telesphorus is venerated as a saint, and his feast day is celebrated on January 5. His leadership contributed to the development of the early Church during a time of persecution and growth.