这些彩色玻璃花窗是世界上保存最完整、最典型的中世纪彩色玻璃杰作。围绕着圣经故事，这些花窗描绘出近五千个拜占庭风格的人物，它使整个大教堂成为“一座彩色玻璃博物馆”。

彩釉玻璃是将无机釉料（又称油墨），印刷到玻璃表面，然后经烘干，钢化或热化加工处理，将釉料永久结于玻璃表面而得到一种耐磨，耐酸碱的装饰性玻璃产品。

Color glaze glass is an inorganic glaze (also known as ink), which is printed to the surface of glass, and then dried, tempered or heated to process the glaze on the glass surface to get a wear-resistant, acid and alkali decorative glass product.