The "ideal" nature of such a city may encompass the moral, spiritual and juridical qualities of citizenship as well as the ways in which these are realised through urban structures including buildings, street layout, etc.
The nobility of the Renaissance, seeking to imitate the qualities of Classical civilisation, sometimes sought to construct such ideal cities either in reality or notionally through a reformation of manners and culture.
The Renaissance concept of an Ideal town developed by Italian polymath Leon Battista Alberti (1404–1472), author of ten books of treatises on modern architecture titled De re aedificatoria written about 1450 with additions made until the time of his death in 1472, concerned the planning and building of an entire town as opposed to individual edifices for private patrons or ecclesiastical purposes.
Further examples may have been intended to have been read into the so-called "Urbino" and "Baltimore" panels (second half of the fifteenth century), which show classically influenced architecture disposed in logically planned piazzas.
[5] Another notable example of the concept is Zamość in eastern Poland, founded in the late 16th century and modelled by the Italian architect Bernardo Morando.