(fl Pisa, 1152). Italian architect. The name appears in three inscriptions: one on a pilaster in the baptistery at Pisa (‘deotisalvi magister huius operis’), one on the campanile of S Sepolcro, Pisa, and one on the inside north wall of S Cristoforo, Lucca. The last is generally attributed to a different craftsman of the same name. At the Pisa Baptistery (see), begun in 1152, Diotisalvi presumably worked on the planning, on the execution of the lower storey of the exterior and, inside, on the erection of the monumental granite columns from Elba and Sardinia and of the piers (excluding the capitals). The centralized design is based on the rotunda of the Holy Sepulchre in Jerusalem, which may suggest that Diotisalvi’s original scheme included the arcaded gallery and truncated conical roof. The signed inscription on the campanile of the Pisan church of S Sepolcro probably refers to the whole church. This is characterized by a similar centralized plan with a cupola, but it is smaller than the baptistery. The original octagonal structure—with eight tall pilasters, pointed arches and a dome raised on a drum—has, however, been much altered and restored....