In the Christian Gospel of Mark, Mark 16 verses 19 and 20, the Apostles of Jesus dispersed from Jerusalem after the Ascension of Jesus. According to tradition they founded the Apostolic Sees. This Apostolic Age event was celebrated by a liturgical feast in some places in commemoration of the missionary work of the Christian Apostles credited with having established the Apostolic Sees. In those places it was celebrated as a major double on 15 July.