Calçada portuguesa: why does the Rossio's pavement have waves?

Who invented Portuguese pavement?

The idea of drawing on the ground with white and black stone is credited to a soldier: Eusébio Pinheiro Furtado, lieutenant general and governor of arms of São Jorge Castle. Around 1841 or 1842 (the sources can't agree on the year), he had a black-and-white zigzag laid at the castle: on the parade ground, according to the association devoted to calçada; on one of the approaches, according to a 2024 study.

The people who laid those stones were prisoners. They were known as grilhetas, after the chains fastened round their ankles. Which prison they came from isn't entirely clear either: one study says the Limoeiro jail, while other sources speak of prisoners held at the castle itself.

That first paving won the city over. In May 1844, the council paid for a street to be paved the same way, the one named after the Marquês de Tancos. It was the start of something much bigger.

Why is there a sea drawn on the Rossio?

In 1845 carriages and horses were banned from the middle of the Rossio, and the council had to decide what to put there instead. In April 1848 it agreed to pave it, and in July it approved the design Furtado put forward: great black-and-white waves.

Work began on 17 August 1848 and finished on the last day of 1849. The grilhetas worked alongside the calceteiros, the craftsmen who lay the stones. As fewer and fewer prisoners were left, the job was finished by the council's own pavers. All told, 8,712 square metres. The white is limestone; the black, basalt.

The design was called the Mar Largo. A 2024 study explains that the name pays tribute to the Portuguese voyages of discovery and echoes a phrase from Camões's epic poem Os Lusíadas, the "conquista do mar largo", the conquest of the open sea. A city of sailors was drawing the ocean right in its centre, by hand, one stone at a time.

Are the waves you're walking on the originals?

No. The Mar Largo was lifted in 1919, and the Rossio spent decades with no sea at all. Why it was removed, the sources we've read don't say.

Its return was slow, and the accounts differ. The same 2024 study mentions a partial reinstatement in 1976. The association devoted to the history of calçada dates the council's unanimous decision to bring it back to 25 June 1979, though on a smaller scale, because traffic still needed its space. Where everyone agrees is on the ending: the pattern you see arrived with the refurbishment of the square, begun in 1995 and opened in 2001.

So if anyone tells you those are the stones of 1848, now you know better.

What does Copacabana have to do with the Rossio?

While Lisbon was left without its waves, the pattern had already crossed the Atlantic. According to the 2024 study, in the early twentieth century wave-patterned calçada paved the Largo de São Sebastião in Manaus and the seafront at Copacabana, in Rio de Janeiro. A Portuguese news agency, quoting Lisbon's municipal historians, puts it like this: the Rossio's Mar Largo is the same design that was copied, decades later, at Copacabana.

Be careful with the shortcut version, though, the one that says "Copacabana is a copy of the Rossio". Today's famous calçadão opened in 1970 and is the work of Roberto Burle Marx, who reinvented a wave design that had been there long before. The family resemblance is real. The photocopy isn't.

Why do so many Lisbon pavements have calçada?

Because it became compulsory. In 1895, Lisbon City Council made it mandatory for every pavement laid or relaid from then on. Most of it, mind you, was the plain kind: white stone, no patterns. What had begun as a general's bright idea at the castle ended up as the floor of the whole city.

The city has kept its templates, too. A council store holds a collection of moulds for decorative calçada, and according to the municipal historians the oldest one found is likely to be the Mar Largo's, from 1848–1849. It's not in good condition, but it has survived.

The technique is still in use. In Belém, the coats of arms in the Praça do Império, which for decades were made of shrubs, were moved into the paving underfoot when the garden was refurbished and reopened in 2023.

One last practical tip: calçada gets slippery in the rain. Shoes with a decent grip are your best insurance.

Fact or legend?

• Fact: the Rossio's Mar Largo was laid in 1848–1849 to a design by the castle's military governor, by prisoners and municipal pavers; it was removed in 1919, and today's pattern dates from 2001. In 1895, calçada was made compulsory for new or relaid pavements in Lisbon.
• Where sources disagree: whether that first paving at the castle was laid in 1841 or 1842, and whether it was the parade ground or one of the approaches; which prison the workers came from; and whether the pattern's return began with a partial reinstatement in 1976 or with the 1979 decision.
• Interpretation: the nod to Camões in the name is explained by a 2024 study.
• Handle with care: that the oldest mould in the council store is the Mar Largo's is what the municipal historians believe, not a certainty.
• Not so: that the Rossio's stones are the ones laid in 1848, or that the Copacabana promenade is an exact copy of the Rossio.

Where to hear it

Podtour tells this story on Lisbon's free route, "Lisbon's Baixa: from Terreiro do Paço to the Rossio", at the stop "A sea of stone in Rossio", which you listen to on the south side of the square with the pattern in front of you. Straight after, the route ends beside the column with "An emperor in Rossio?" and with something that lay hidden under that very ground. The Belém coats of arms are at the stop "Coats of arms planted in the garden", on the route "Belém: the Jerónimos, the Padrão and the hidden side of empire".

If you're planning your trip, our Lisbon guide has the practical side covered.

Further reading

• Associação da Calçada Portuguesa, "História" (English version): https://calcadaportuguesa.org/en/historia-2/
• Ana Cannas da Silva, José Francisco Rodrigues and Suzana Metello de Nápoles, "As simetrias nas calçadas de Lisboa", Revista de Ciência Elementar 12(3) (2024), doi:10.24927/rce2024.025 (in Portuguese): https://rce.casadasciencias.org/rceapp/art/2024/025/
• Lusa in Observador, "Lisboa tem coleção de moldes da calçada artística e criará centro interpretativo" (2026, in Portuguese): https://observador.pt/2026/08/02/lisboa-tem-colecao-de-moldes-da-calcada-artistica-e-criara-centro-interpretativo/
• Monumentos Rio, "Calçadão de Copacabana", inventory of Rio de Janeiro's monuments (in Portuguese): https://monumentos.rio.br/id/A970/
• Antoni Remesar and Dánae Esparza, "El diseño del suelo y la imagen de la ciudad: la calçada portuguesa", on the w@terfront 32 (2014), University of Barcelona (in Spanish, with an English summary): https://revistes.ub.edu/index.php/waterfront/article/download/18833/21484/40906