Federico da Montefeltro
Urbino was an important centre with the ancient Ducal Palace being extended for Federico da Montefeltro in the mid 15th century. The Duke employed Luciano Laurana from Dalmatia, renowned for his expertise at fortification. The design incorporates much of the earlier medieval building and includes an unusual turreted three-storeyed façade. Laurana was assisted by Francesco di Giorgio Martini. Later parts of the building are clearly Florentine in style, particularly the inner courtyard, but it is not known who the designer was.