St. Mary’s Church in Kilkenny has been converted into the Medieval Mile Museum. The project combines sensitive restoration and contemporary design to an exemplary standard. The project became an experiment in the use of archaeology to define an architectural solution. New elements are made of timber and lead. The project worked with the nature of the building, leaving exposed a large section of the original medieval timber roof. Archaeological excavations revealed the presence of extant foundations under the earth. New structures were placed on these, developing a sequence of internal spaces.