Francesco di Giorgio, the Sienese architect and artist, visited Rome c. 1470. By looking at his plan of the ‘porticho del Champitolio’, it is possible to reconstruct not only what Francesco di Giorgio saw on the Monte Tarpeo, but also what Poggio Bracciolini, Flavio Biondo, Pietro del Massaio and others saw there. It was apparently a notable site, an evocative ruin worthy of commentary, artistic representation and imaginative reconstruction. Whatever temple remains continued to be visible, however, these were insufficient to suggest that they were originally part of the temple. By the end of the fifteenth century, the temple had been lost. None the less, Francesco di Giorgio unwittingly documented the last standing columns of the Temple of Jupiter Optimus Maximus.