The most discussed of the cupola churches is St. Front at Périgueux. For a while it was considered a mother church of the school, but such well-constructed domes are a culmination, not a beginning. One of the oldest cupolas extant is that of St. Astier, near Périgueux, finished in 1018; there are two large domes over Cahors Cathedral, in which church Pope Calixtus II blessed an altar in 1119.[177] The two cupolas over Cahors' unaisled nave appear in the exterior view, but were not well enough constructed for their inner surfaces to be left uncovered by coats of plaster, whereas the interior masonry of St. Front is beautifully finished, proving that in point of time it was separated from St. Astier. Long and heated have been the controversies over the date of the cathedral of Périgueux. As much space has been devoted to the discussion as to the little Morienval in the Ile-de-France. At first it was taken to be the church begun before 1000 and dedicated in 1047. To-day no one dreams of saying it predates the fire of 1120. A few of the bays of the ancient church, burned in 1120 with much loss of life, were retained as parish rooms and now stand to the south of the present cathedral's façade. It is very evident that they never were intended to be incorporated in the new church. Once it was thought that the actual St. Front, which is in the shape of a Greek cross, with a dome over each of its arms, copied St. Mark's at Venice. St. Mark's was modeled on the church of the Apostles at Constantinople, destroyed by Mohammed II in 1464. However, its domes were added only when the basilica was rebuilt, in 1063. And furthermore, there are indications at St. Front to show that the original design was to lengthen its nave by another bay, which would have changed the plan from a Greek cross to the universally used Latin cross. The present St. Front was begun after 1120 and probably was completed by 1180, in which year a record says that Bishop Pierre de Mimet (1169-80) moved the ancient tombs into the basilica. During some modern repairs parchments were discovered in a scaffold hole thirty feet from the ground and closed only by a loose stone. The MSS. were in the Romance dialect of the XII century, and were abusive of Henry II of England, who besieged Périgueux in Bishop de Mimet's time. Such a hiding place for compromising papers might well have been thought of during the last stage of a building while yet the scaffolding stood in place.