[citation needed] The Ideal City stored in Baltimore (Walters Art Museum) is a 15th-century painting usually attributed to the architect and artist Fra Carnevale.

Furthermore, in an inventory of the palace completed in 1599 there is mention of a "long rectangular painting depicting an antique but beautiful perspective from the hand of Carnavale".

[2] The panels might have been spalliere, forming part of a decorative scheme set into the wainscoting or furnishings, a style common in Italy in the late 15th century.

[3] However, the painting is attributed by others to Francesco di Giorgio Martini, partly due to the latter's greater significance at the Urbino court and because the painting refers to architectural themes he refers to, derived from Leon Battista Alberti's slightly earlier published treatise, in his own architectural treatise.

In the foreground, there are four allegorical sculptures, each representing the personification of virtue: Justice with her scales, Moderation with a pitcher of water to mix with wine, Liberality with a cornucopia, and Courage with a column.

The receding lines that establish spatial relationships converge at a central point, located in the middle of the city gate.

[5] In a scene from the 1995 thriller, Twelve Monkeys, Bruce Willis' character looks at The Ideal City in the Walters Art Museum.

[8] The Ideal City stored in Urbino (Galleria Nazionale delle Marche) was formerly attributed to Piero della Francesca,[9][10] then to Luciano Laurana, Francesco di Giorgio Martini or Melozzo da Forlì.

The Architectural Veduta stored in Gemäldegalerie Berlin had been attributed tentatively to Francesco di Giorgio Martini and dated eventually as 1490.