Jacob Burckhardt (1819-1897), The Civilisation of the Renaissance in Italy
, tr. S.G.C. Middlemore (London: Swan Sonnenschein & Co., 1892), p. 45, with beginning of footnote:
Of him [Federigo of Montefeltro, Duke of Urbino] and his two successors, Guidobaldo and Francesco
Maria, we read: 'They erected buildings, furthered the cultivation of the
land, lived at home, and gave employment to a large number of people:
their subjects loved them.'1
1 Franc. Vettori, in the Arch. Stor. Append., tom. vi. p. 821.