Theodore of Tarsus was an influential archbishop of Canterbury in the 7th century, serving from 668 to 690 AD. He was born in Tarsus, in present-day Turkey, and became a key figure in the early Christian church in England. His leadership helped to unify the church and establish a more organized structure, promoting education and monasticism. Theodore is known for his role in the Synod of Hertford in 673 AD, which addressed various church practices and established guidelines for clergy. He also played a significant part in the spread of Christianity in Britain, fostering relationships between different regions and strengthening the church's influence.