Bibliografía (27 obras)
Giardini d'Italia
2011
The companion guide to Rome
2009
Federico 2. di Svevia
2001
The Companion Guide to Rome (Companion Guides)
1987
The Borgias
1981
Courtesans of the Italian Renaissance
1975
Ancient Rome, from Romulus to Augustus
1974
A concise history of Republican Rome
1973
Frederick II of Hohenstaufen
Fodor's Rome
1971
Derbyshire village schools in the nineteenth century
1970
Queen Christina
1968
Christina, Königin von Schweden
Dumbarton Oaks
1967
Italian villas and palaces, etc. [With illustrations.]
1966
Italian Gardens [The World of Art Library
1965
Merveilles des palais et villas d'Italie
1962
Italian gardens
1961
Italian Gardens
Italian villas and palaces
1959
Ville e palazzi d'Italia
Frederick II of Hohenstaufen, a life
1957
Frederick II of Hohenstaufen, a Life
