[2] The construction of the Ducal Palace was begun for Duke Federico III da Montefeltro around the mid-fifteenth century by the Florentine Maso di Bartolomeo.

[4] The Ducal Palace is famous as the setting of the conversations which Baldassare Castiglione represents as having taken place in the Hall of Vigils in 1507 in his Book of the Courtier.

The palace continued in use as a government building into the 20th century, housing municipal archives and offices, and public collections of antique inscriptions and sculpture (the Galleria Nazionale delle Marche, see below).

[5] A central element in this plan is the studiolo (a small study or cabinet for contemplation), a room measuring just 3.60 x 3.35m and facing away from the city of Urbino and towards the Duke's rural lands.

[6] Its beautifully executed intarsia work, surrounding the room's occupant with trompe-l'œil shelves, benches, and half-open latticework doors displaying symbolic objects representing the Liberal Arts, is the single most famous example of this Italian craft of inlay.