By the 6th century the iconography of the Ascension had been established and by the 9th century Ascension scenes were being depicted on domes of churches. In some representations there may be no mountain and he may be climbing a mandorla, or be lifted towards Heaven in a mandorla by angels. In Romanesque depictions sometimes just the feet of Christ are shown as he disappears up into the clouds; this depiction became the most popular in Northern Europe, where it lingered in provincial wood reliefs until well after the Reformation. Sometimes the last two footprints of Christ on the rock are seen; these were shown to pilgrims at what is now the Chapel of the Ascension on the Mount of Olives in Jerusalem. The scene may also include the Apostles, two men in white and the Virgin Mary.