Rustic work is a type of architectural decoration found in many Medieval and Renaissance buildings, characterised by the use of material deliberately left in its natural state, i.e. unfinished and polished. Typical of rustic work is the rustication already used in ancient times even by the Romans. Its application, also theorised by Leon Battista Alberti, reached its peak in the Renaissance period, used in buildings and as a decorative element in fountains and monumental doors.