The answer is that the image (which I can't post right now since my computer is being a little complicated) is a fresco uncovered in what Professor Stager, co-director of the excavation, identifies as the Church of St. Mary of the Green which is located near Ascalon's Jerusalem Gate. The church, built in the 5th century, was originally laid out as a basilica divided into three aisles by two rows of columns which supported a gallery and a pitched roof. Tradition holds that the church continued to function as such throughout much of the Islamic period before being converted into a mosque by the Fatimids (late 9th - mid 12th century). When the Crusaders conquered Ascalon in 1153 CE the building was restored to a church with some changes in its plan. It was also during the Crusader period that frescoes, part of which you see here, were added to the central apse and two side niches of the church. In the central apse the frescoes are of four saints/bishops reading Greek scrolls, each scroll containing excerpts from the homilies of St. John Chrysostom, who was bishop of Constantinople from 398-407 CE.
Here's the next one. Any ideas?