The paper describes the analysis of the oval frame vault of the ballroom of Villa Borromeo in Cassano d’Adda (Milan), one of the most important, yet not deeply studied, countryside villas of the Adda family. The vault is a particular example of a frame vault on an oval plan, where the main elements that characterize the space are the skene arches and the curved lunettes. The article sheds light on the constructive and geometric genesis of this particular type of vaulting, which was a common construction practice of architects and builders in the Modern Age in Northern Italy. The analysis of the vault geometries and construction techniques is carried out through a geometric and photogrammetric survey, the elaboration of drawings, and a 3D model.

中文翻译：

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Cassano d'Adda Borromeo 别墅的赛马场椭圆形框架拱顶

本文描述了对卡萨诺达达（米兰）博罗梅奥别墅宴会厅椭圆形框架拱顶的分析，这是阿达家族最重要但尚未深入研究的乡村别墅之一。拱顶是椭圆形平面上框架拱顶的一个特殊例子，其中表征空间的主要元素是骨架拱门和弯曲的月牙形。这篇文章阐明了这种特殊类型的拱顶的建设性和几何起源，这是现代意大利北部建筑师和建筑商的常见建筑实践。拱顶几何形状和施工技术的分析是通过几何和摄影测量、图纸制作和 3D 模型进行的。