Rome's Sampietrini Cobblestones

There are many iconic sights in Rome that immediately come to mind when thinking about Italy's most visited city: the Colosseum, Trevi Fountain, Pantheon and the Vatican are all unmistakable monuments. But most Italians could recognize the Eternal City by simply looking down at the road under their feet.

sampietrini-roma-piazza-del-popolo-cr-brian-dore(Photo by Concierge in Umbria via Flickr)

Most of Rome's historic center is paved with a unique type of cobblestone called “sampietrini”. These are 12 centimeter cubes of black basalt, trimmed and set in straight rows or intersecting arches on a sand or earth foundation, with the same sand or earth filling the space between each block.

sampietrini-roma-cr-brian-dore(Photo by Concierge in Umbria via Flickr)

Paving Rome's roads with sampietrini began during the 16th century, and the first cobblestones were made by trimming larger basalt blocks that had been used to pave the roads of ancient Rome. Smoother and stronger than terracotta bricks, sampietrini soon covered almost all streets in medieval Rome.

sampietrini-roma-cr-brian-dore(Photo by Concierge in Umbria via Flickr)

The name “sampietrini” is said to have been coined in 1725 by Monsignor Ludovico Sergardi, the prefect of the Fabbrica di San Pietro who oversees all public works in the Vatican. After noting the poor condition of the surface of Piazza San Pietro, where the Pope's carriage had almost been overturned by the potholes, he decided to pave the entire piazza with basalt blocks. From San Pietro, the name slowly evolved into sampietrini (or, in Roman dialect, “serci”).

sampietrini-roma-cr-brian-dore(Photo by Concierge in Umbria via Flickr)

Sampietrini are particularly suitable to Rome's irregular ground surface, as the lack of mortar between the blocks leaves the sampietrini to undulate with the movement of the earth below. This type of paving can hold up to the heavy traffic of an urban city, and is also excellent at absorbing water into the spaces between each block, causing less stress on the city's overtaxed sewer system.

sampietrini-roma-cr-brian-dore(Photo by Concierge in Umbria via Flickr)

Unfortunately, the same irregularity that enables sampietrini to adapt to irregular surfaces can make it dangerous for bikes and mopeds, easy to trip over on foot, and noisy under rattling trucks if not laid with skill and properly maintained. For these reasons, Rome's historic sampietrini are slowly being replaced by modern asphalt in all but the most historic neighborhoods, despite protests from residents and visitors alike. So the next time you're in Rome, be sure to look down and appreciate the beauty and precision of the sampietrini streets.

sampietrini-roma-oro-trastevere-cr-brian-dore(Photo by Concierge in Umbria via Flickr)


Related posts:
The Fountains of Rome
The Palazzi Museums of Rome
48 Hours: Roma (Rome)

Contributor: Rebecca Winke

Concierge in Umbria
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