sentences:  The towers were placed at the corners of the building, with an interior walkway around the building and a horizontal band between the two floors; a high roof and "lucarnes", or dormer windows, which rose above the roofline and framed with pediments and topped with ornate windows with pediments which rose above the roof level, which became the most recognizable feature of French Renaissance architecture.The double doorway was constructed like a small arch of triumph.The grand stairway, in the Italian style, was the most important interior feature; it had a coffered ceiling decorated with sculpture.