On the other hand, in the façade of Francis I, the ornament of the dormer windows, as well as the decorative details elsewhere, are of Italian design. The cornice has been given a more pronounced decorative treatment; it has a bolder projection and, while the old machicolations are represented they are converted into a purely decorative motive. Further, although the square mullion windows still appear, they are framed with pilasters and cornice and the intervening spaces of solid wall are treated as panels and enriched with arabesques. The finest feature of this wing is the staircase tower, which occupies the centre of the façade on the side facing the court. Polygonal in plan, it is constructed with four great piers, extending from the ground to the cornice, to which are fitted the rising balustrades. The whole is magnificently Gothic in its structural design as well as in the character of the canopied niches; but the actual ornament is Renaissance and was probably executed by Italian artists. In the pierced carving of the balustrades the decorative motive is the King’s monogram, “_F_,” intertwined with his emblem, the Salamander. =Château de Chambord.=--Another famous staircase appears in the =Château de Chambord=, a palace which in other respects also presents most interesting features. It was erected by Francis I (1526), probably as a hunting box, and the architect, Pierre C. Nepveu, has adhered more closely than had been usual to the plan of a feudal fortress. For in place of the gateway in the centre of the screen wall, a square structure with corner towers, which are round outside but square in the interior, projects into the courtyard, in the manner of a donjon-keep. Yet its purpose was not for defence but for ceremonial entertainment, since the interior contains four halls carried up to a great height and covered with coffered barrel vaults, while the centre of the plan is occupied by the staircase.