The patron: Gregory XIII and the power of cartography

The Gallery was commissioned by Pope Gregory XIII Boncompagni (pontificate 1572–1585) — the same pope who in 1582 reformed the Julian calendar into the Gregorian calendar still in use today.

Gregory XIII was a pope deeply interested in science and diplomacy. In the sixteenth century, maps were not simple geographical tools: they were instruments of power. To display the lands of the Italian peninsula and the papal territories as decoration in the transitional corridor of the papal apartments was a declaration of sovereignty and of knowledge of the world.

The cartographer: Ignazio Danti

The execution of the Gallery was entrusted to Ignazio Danti (1536–1586), a Dominican friar, cosmographer, mathematician and cartographer of European standing.

Danti was already well known for having mapped Tuscany on behalf of Cosimo I de' Medici, using cutting-edge triangulation methods for the period. Gregory XIII appointed him pontifical cosmographer in 1577 and entrusted him with a task of gigantic proportions: to map the entire Italian peninsula by 1580.

Danti worked with a team of specialist painters — including Cesare Nebbia and Girolamo Muziano for the ceiling — between 1580 and 1583. In fewer than four years, the Gallery was complete.

The maps: 40 works in one

The forty maps cover:

The regions of the Italian peninsula

Each panel corresponds to a historical region: Liguria, Piedmont, Lombardy, Veneto, Emilia, Tuscany, Umbria, Lazio, Campania, Calabria, Puglia, Basilicata, Abruzzo, Marche. Each map is oriented with the sea at the bottom — someone walking the Gallery from east to west sees the Adriatic coasts first (left wall), then the Tyrrhenian coasts (right wall).

The islands of the Mediterranean

Added to the regional maps are views of the principal islands and ports: Malta (with the Great Siege), Corfu, Rhodes, Elba, Corsica, Sardinia, Sicily. The siege views — such as that of Malta in 1565 — are among the most detailed cartographic representations of naval battles from the period.

The two panels of Rome and Avignon

The corridor opens and closes with two particular maps: the city of Rome (showing its urban development as of 1580) and Avignon (with its papal territories beyond the Alps) — the two poles of papal power throughout medieval history.

Scientific precision

For a work from 1580, Danti's maps are of surprising accuracy. Danti used trigonometric measurements and field topographic surveys — a rare method for the period. Comparing his maps with modern cartography, the errors in the position of cities and coastlines are often less than 5–10%.

Some exceptions: the southern coasts of Sicily and Calabria show greater distortions, probably due to less accurate measurements in those areas. The regions of Northern Italy, where Danti had already worked for the Medici, are the most precise.

The ceiling: the overlooked masterpiece

Most visitors look at the maps. Very few look up at the ceiling, which is at least equally extraordinary.

The coffered ceiling was decorated between 1580 and 1585 by Cesare Nebbia with the collaboration of other painters. The gilded coffered structure with stucco is an elaboration of the Roman antiquarian tradition (coffered ceilings of the Pantheon and the Basilica of Maxentius), while the painted scenes inside illustrate:

  • Episodes from the lives of saints and miracles that occurred in the regions depicted on the maps below: opposite the map of Tuscany, scenes of Saint Catherine of Siena; above Lazio, scenes of the conversions of Roman martyrs
  • Allegories of papal virtues
  • Medallion portraits of popes, prophets and biblical figures

The thematic connection between the wall map and the ceiling scene is one of the finest iconographic architectures in the Vatican Museums.

Orientation

The maps are oriented with the sea in the position closest to the viewer — as if one were at sea looking toward the coast. This orientation differs from the modern convention (north at top). To read the maps correctly, one must imagine being out at sea.

The inscriptions

Each map is accompanied by cartouches with Latin inscriptions indicating the name of the region, principal geographical features and, often, historical or hagiographical notes. The inscriptions are in humanist Latin — reading them requires a knowledge of classical Latin.

Where to linger

  • The map of Lake Garda: among the most precise and artistically elaborate
  • The View of Malta with the Great Siege (1565): extraordinary historical-cartographic document
  • The map of Rome: compare the urban fabric of 1580 with that of today
  • The ceiling at the centre of the Gallery: here the iconographic programme is at its most elaborate; looking up for 5 minutes is worth the stiff neck

In 1580, when the Gallery was completed, Italy was not yet a unified state — it would not become one until 1861. The peninsula was divided among duchies, republics, Spanish domains and the Papal States.

To represent all of Italy as a single visual unity in the papal apartments was a political act: the pope claimed a continuity of moral and historical authority over all the territories of the peninsula, regardless of their actual political sovereignty.

The Gallery was also an instrument of active diplomacy. When foreign ambassadors walked the corridor toward the audience chambers, they saw the scientific capacity of the Papal State to know and name every corner of Italian territory.

Photography

Permitted. The Gallery is one of the spaces in the Vatican Museums where photography is explicitly allowed. Use a wide-angle lens for the full panels; zoom for inscriptions and ceiling details.

The crowd problem

The Gallery is about 6 metres wide. With Vatican Museums visitor volumes at peak hours, it becomes a bottleneck. The advice is to stop near a window (the windows look out onto the Cortile del Belvedere) and wait for the flow to ease before examining the maps.

Binoculars

Strongly recommended for the ceiling — the height is approximately 6–7 metres and the details of the painted scenes are difficult to read with the naked eye.

Arriving with a driver

The Vatican Museums open at 9:00. Those who arrive at opening time, before tour groups build up, have the Gallery almost to themselves for the first half-hour.

Arrive punctually at Vatican Museums opening: private driver with direct drop-off at Viale Vaticano. Service from €49. → Book your driver at myromedriver.com

Frequently asked questions

How long does it take to visit the Gallery of Maps? A quick pass-through takes 10 minutes. A careful examination of the maps and ceiling takes 30–45 minutes. The Gallery is often crossed in 5–7 minutes by tourist flows — resisting the current and stopping is the right choice.

Are the maps still accurate? For 1580, they are extraordinarily accurate. They obviously have errors compared to modern GPS-based cartography, but they demonstrate remarkable topographic competence. Some mountainous areas are schematic; coastlines are generally well represented.

Is Ignazio Danti known for other works? Yes. Before the Vatican work, Danti had mapped Tuscany for Cosimo I (some maps are in the Palazzo Vecchio in Florence). He also built the gnomon of Santa Maria Novella in Florence to measure the solstice — an instrument fundamental to the reform of the Gregorian calendar.

Is the ceiling original? Largely yes. It has undergone restorations over the centuries, the last significant one in 2000 for the Jubilee. The original structure and decoration are substantially preserved.

Are the maps numbered or ordered in some way? The maps follow one another from north to south of the peninsula on both sides of the Gallery. On the east side (windows onto the Cortile del Belvedere): Adriatic regions. On the west side: Tyrrhenian regions. At the two ends, the maps of Rome and Avignon.

Article no. 25 — TIER S — MON-02 Vatican Museums + Sistine Chapel Type: HISTORY Words: ~2,400

See also