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.

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.

Portrait of a Lady by Raphael
Portrait of a Lady, La Mutta (1505-1509) by Raphael (Raffaello Sanzio da Urbino). Palazzo Ducale, Urbino.