[La Nuova Topografia di Roma] — The Vatican, St. Peter’s Basilica, and Castel Sant’Angelo.

Description

The Heart of Christendom, Measured to the Last Column

This is the upper-right sheet of Giambattista Nolli’s 1748 La Nuova Topografia di Roma, one of the most celebrated urban maps ever made. It presents the Vatican complex in full ichnographic detail, including St. Peter’s Basilica and the great elliptical colonnaded piazza before it, the Cortile del Belvedere, and the sprawling Vatican Palace, alongside Castel Sant’Angelo and the dense street grid of the Borgo.

No sheet in the atlas concentrates more of Rome’s monumental and spiritual gravity onto a single page.

The Map in Detail

The sheet covers the Rione Borgo, Rome’s fourteenth district, and the Vatican hill beyond it. At its center, St. Peter’s Basilica is rendered with the full precision of an architectural drawing, its nave, transepts, and apse shown in plan alongside Bernini’s vast elliptical colonnade enclosing the piazza. To the north, the Vatican Palace extends into the Cortile del Belvedere, its formal garden compartments laid out with the same care Nolli devoted to the city’s streets and buildings.

Beyond the palace walls, the Vatican gardens are depicted with their geometric beds and boschi, merging into the open countryside of the Valle dell’Inferno and the lower slopes of Monte Mario. To the east, the Borgo’s rectilinear street pattern, shaped by centuries of pilgrimage traffic and papal planning, is shown in dense ichnographic detail, with churches, hospitals, and confraternities all individually plotted.

At the right margin, Castel Sant’Angelo, shown with its star-shaped Leonine fortifications and the circular mass of Hadrian’s mausoleum at its core, anchors the sheet at the Tiber crossing. The river itself curves across the lower right corner, its surface rendered in Nolli’s characteristic flowing line work, with the Piazza di Ponte and the approaches to the Rione Ponte just visible at the sheet’s edge.

Historical Context

The map was commissioned by Pope Benedict XIV, and nowhere is the purpose of that commission more legible than on this sheet. The Baroque replanning of Rome, funded and directed by the papacy over the preceding century and a half, had reorganized the city around its sacred monuments, cutting new streets to connect the great pilgrimage churches and framing St. Peter’s with Bernini’s colonnade as an architectural expression of the Church’s universal embrace. Nolli’s ichnographic method, which rendered publicly accessible spaces in white and private interiors in shadow, was uniquely suited to the Vatican complex: the basilica’s interior, open to all the faithful, reads as a luminous void of the same order as the piazza before it, visually continuous with the city’s public life. The Cortile del Belvedere, by contrast, appears as an enclosed and private world behind the palace walls. No earlier map had made this distinction so legible or so beautiful.

Publication History and Census

This sheet is one of twelve that together compose Nolli’s La Nuova Topografia di Roma, published in Rome in 1748. The complete map measures approximately 6.75 by 5.5 feet when assembled. Institutional copies are recorded at the British Library, the Bibliothèque nationale de France, and the Bayerische Staatsbibliothek, among others. Individual sheets are rarely sold on the market; we only do so here because our copy is incomplete.