Note 51 — Chapter I

The five eastern window openings of S. Miniato are filled with slabs of antique pavonazzetto with red-purple markings, nearly two inches thick and measuring in surface about 9 ft. by 3 ft. The windows are square headed. The slabs transmit the light unequally according to the darker or lighter patches in their markings, but the effect is pleasing. Similar window fillings are to be seen at Orvieto. ‘Almost any marble,’ it has been said, ‘with crystalline statuary ground, an inch thick, placed on the sunny side of a church in Italy would admit sufficient light for worship, but it would not do in our variable climate.’ The so-called Onyx marbles of Algeria and Mexico, as well as Oriental alabasters, are specially suitable for the purpose here in view. The ‘white and yellowish’ eastern marbles that Vasari writes of were probably of this kind.