Acibadem Eskisehir Solar Power Plant Transformer Center, designed to serve as a control building for the solar energy field built to meet a large part of the energy needs of Acibadem Hospitals in Odunpazari, Eskisehir, includes a gathering area and viewing deck in addition to technical areas, and explores the relationship between masses that create contrast with each other. The ground-level mass achieves an opaque facade appearance through the use of straw plaster, while the upper mass forms an abstract volume using a silicone-composite glass facade to showcase the panoramic view. The straw plaster used on the facade also influences the interior space through various wall surfaces and furniture.