Masonry Capacity building and two way learning happened naturally at all stages and areas of the project, from design workshops with the local builders through on-site development of specific construction methods. Volcanic stone is a ubiquities element of the northern Rwandan landscape; commonly thought of as a nuisance by farmers clearing their fields. When used in building, it is typically only for foundations or courtyard walls, and is often covered partially or completely with mortar. In an effort to reveal the exceptionally unique and beautiful texture of the stone we sought to minimize mortar, and create an even and nearly seamless expanse of deep gray porous walls. After multiple mock-ups, the mason’s began to get excited about the product that was appearing, and finally were given the go- ahead. As they progressed through the various buildings on the hospital campus, their work became more and more refined. Recognizing how their skill had advanced as they worked, the masons eventually offered to replace their initial work at no cost, out of a sense of pride. As newly trained, highly skilled contractors, these masons are now sought after in other parts of the country by contractors seeking to replicate the “magnificent stone walls of Butaro.”