Titus Lucretius Carus - De Rerum Natura (On the Nature of Things)
Biblioteca Malatestiana in Cesena. Unfortunately I don't know how old this copy is.

Neume initial
Biblioteca Malatestiana, Cesena.

Chapel of the Corporal
Chapel of the Corporal (1350-1356) by Ugolino di Prete Ilario. Orvieto cathedral.

John the Baptist
John the Baptist - Window in Todi Cathedral

Spoleto Cathedral, interior

Coronation of the Virgin
Coronation of the Virgin, Filippo Lippi (1467-69). Spoleto Cathedral

Coronation of the Virgin
Coronation of the Virgin by Filippo Lippi (1467-69). Spoleto Cathedral

Triptych of Perugia
Triptych of Perugia (1275), Maestro del Trittico Marzolini, detail. Galleria Nazionale dell'Umbria, Perugia.

Two-sided Crucifix
Two-sided Crucifix (1272), Maestro di San Francesco. Galleria Nazionale dell'Umbria, Perugia.

Madonna with Child
Madonna with Child (1476) by Alvise Vivarini. Saints Francis, Peter, Paul and John the Baptist. Palazzo Ducale, Urbino.

Flagellation of Christ
Flagellation of Christ (1460) by Piero della Francesca. Palazzo Ducale, Urbino.

Flagellation of Christ
Flagellation of Christ (1460) by Piero della Francesca. Palazzo Ducale, Urbino.

Institution of Eucharist
Institution of Eucharist (1473-1476) by Joos Van Wassenhove (Giusto di Gand) and Corpus Domini predella (1467-1468) by Paolo Uccello. Palazzo Ducale, Urbino.

Corpus Domini predella
Corpus Domini predella (1467-1468) by Paolo Uccello. Palazzo Ducale, Urbino.

Annunciation (1485) by Giovanni Santi
Annunciation (1485) by Giovanni Santi Giovanni Santi is the father of Raphael. Palazzo Ducale, Urbino.

Annunciation by Vicenzo Pagani
Annunciation (1532) by Vicenzo Pagani. Palazzo Ducale, Urbino.