But who was St Matthew and what do we know about him? Matthew’s GospelWhat makes Matthew important is the belief that he later wrote an account of Jesus’s life and ministry known as “The Gospel According to St Matthew the Evangelist” or “Matthew’s Gospel” or just Matthew. The oldest is St Matthew’s Cathedral at Salerno in Italy, which claims to have his relics, and where there is an annual St Matthew’s Day procession. St Matthew’s DayIn the Eastern Orthodox tradition St Matthew is remembered each 16 November and in the Coptic Church on 22 October. In the Western Church he is remembered each 21 September which is called “The Feast of St Matthew” or “St Matthew’s Day”.