位于西班牙塞利维亚历史中心方墙之间的这栋老房子，共计三层，占地面积约70㎡，在一定程度上受到了保护。该房屋被一户长期生活在国外的家庭买下，他们最初的要求对最终整体方案起了决定性作用——在三层建筑中建造两个相互独立的房子（留出首层用作临时出租），在当地法规允许的情况下置入一个面积尽可能小的天井（目的是拥有全部可建造的表面），并将白天的活动空间安排在上层（以便能够享受到起居室和餐厅的最佳光线）。

An old house between party walls located in the Historic Center of Seville, with a degree of partial protection, three levels built and a plot area of 70m2, was acquired by a family who had lived a large part of their life abroad, and whose initial requirements were decisive for the final solution: building two independent houses on three floors (leaving the ground floor as a unit for temporary rent), implanting the patio with the smallest possible area according to local regulations (with the aim of gaining the entire buildable surface allowed) and locate all daytime spaces on the upper level (in order to enjoy the best lighting conditions in the living and dining areas).

▼项目概览，Overall view ©Fernando Alda

▼拥有最佳光线的起居室，Living room with the best lighting ©Fernando Alda

▼相对独立的房间，Two independent rooms ©Fernando Alda

塞尔维亚的城市规划要求，每个为了日照的天井和通风的生活空间必需依据其高度来限定直径。因此，圆形轮廓正是天井可以取到的最小表面，这样可以为房屋提供最大的使用面积。

The General Plan of Seville requires that every patio built to illuminate and ventilate living spaces must be able to circumscribe a diameter defined by its maximum height. Therefore, a patio with a circular outline is precisely the patio with the smallest surface possible, and consequently the one that allowed the largest built surface available for homes.

▼模型剖面，Model section ©EOVASTUDIO

▼通高的圆形天井，Full height circular patio ©Fernando Alda

▼从旋转楼梯望向天井，View from stairs to the patio ©Fernando Alda

▼从底层卧室望向天井，View from groundfloor bedroom to the patio ©Fernando Alda

▼从庭院向上看天井，Look up the patio from the courtyard ©Fernando Alda

从这个决策中（天井的形状）产生了一系列的强相关和几何条件，以至于直接引出了最终的解决方案。连接所有楼层的唯一一部楼梯只能是螺旋的，那些与曲线等距的空间成为了最优的间隙循环空间，并且其余空间的划分恰到好处的与这些线条协调。

From this decision (the shape of the patio) a series of forced relationships and geometric conditions were generated that practically unleashed the final solution. In this way, the only staircase that adequately connected all the levels was a circular staircase, the optimal interstitial circulation spaces were those equidistant from the curves and the divisions between the rests of the spaces were most naturally in tune with these lines.

▼连接所有楼层的螺旋楼梯，Spiral staircase connecting all floors ©Fernando Alda

▼厨房，Kitchen ©Fernando Alda

▼卫生间，Toilet ©Fernando Alda

▼建筑出入口，Entrance ©Fernando Alda

▼项目区位，Site plan ©EOVASTUDIO

▼首层平面图，Ground floor plan ©EOVASTUDIO

▼二层平面图，First floor plan ©EOVASTUDIO

▼三层平面图，Second floor plan ©EOVASTUDIO