English art and architecture, the distinctive national art, and (1) architecture that art may be said to have evolved in the 12th century with the Norman style. Building (2) before that time was in what is commonly called the Saxon (3) or Anglo-Saxon style, which combined Roman (4) and Celtic features, it is represented (5) by sparse remains of monasteries, churches, and cathedral crypts, notable (6) for the use of long-and-short ashlar stonework(7) these churches were small, relatively simple structures, having one or (8) more towers and one or three aisles, with wooden or stone roofing.