50 Fun Facts About The Seine

The Seine flows through which country?

It runs 777 kilometres from the Langres plateau through Paris to the English Channel.

The Seine empties into which body of water?

It reaches the sea between Le Havre and Honfleur on the Normandy coast.

The Seine rises about 30 km northwest of which Burgundian city?

The city of Paris has owned the source since 1864 and built a grotto with a statue of a nymph, a dog and a dragon around it.

Roughly how long is the Seine?

It is France's second-longest river after the Loire.

Ocean-going vessels can sail up the Seine as far as which city, 120 km from the sea?

The tidal Seine Maritime from Le Havre to there is the only stretch used by sea-going ships; barges go on to Marcilly-sur-Seine.

How many bridges cross the Seine within Paris?

The best known are the Pont Neuf and the Pont Alexandre III; dozens more cross the river outside the city.

The name Seine derives from Sequana, who was what?

Offerings to her were found at the source, and her statue shows her standing in a boat with a duck-headed prow.

The city of Paris officially bought the source of the Seine in which year?

Rumours of healing powers in the water had circulated since the 17th century, and a grotto to the Seine nymph was built in the 19th.

What does the name Pont Neuf, the oldest standing crossing of the Seine in Paris, literally mean?

It was 'new' because, unlike older bridges, it was not lined with houses; it was inaugurated by Henry IV in 1607.

Which king inaugurated the Pont Neuf in 1607 and has an equestrian statue where it crosses the Île de la Cité?

The park at the island's tip is the Square du Vert-Galant, named for the same king's nickname, the 'Green Gallant'.

In 1985 which artist duo wrapped the Pont Neuf in fabric after years of negotiation with the city?

The bridge has been a protected monument historique since 1889.

The Île de la Cité and which other island are the two natural islands in the Seine in central Paris?

The smaller island was once pasture used for grazing cattle, drying laundry and the occasional duel.

Which famous cathedral stands on the Île de la Cité?

The island also holds the Sainte-Chapelle, built by Louis IX to house the Crown of Thorns he bought in 1239.

The Île de la Cité is home to the Hôtel-Dieu, which holds what possible distinction?

The island was also where the Parlement of Paris first met in 1302 and where aristocrats were tried during the Revolution.

The Gallic settlement on the Île de la Cité that grew into Paris was known by what name?

The Parisii tribe were traders who minted their own coins and used the island as a river crossing and refuge.

Parisians gauge Seine floods by the water level on which statue at the Pont de l'Alma?

When the water reached his thighs the river was unnavigable; in 1910 it reached his shoulders.

The Pont de l'Alma is named after an 1854 battle in which war?

Its tunnel was the scene of the 1997 car crash that killed Diana, Princess of Wales.

The 1910 Great Flood saw the Seine rise roughly how far above its normal level in Paris?

The river did not overtop its banks in the city; the water came up through sewers, subway tunnels and drains instead.

After a flood alert in 2003, roughly how many works of art were moved out of Paris, the biggest relocation of art since the Second World War?

Much of the city's art is stored in underground rooms that a major flood would inundate.

What tourist practice on the Pont des Arts, begun in 2008, ended with a section of parapet collapsing?

More than a million padlocks weighing about 45 tonnes had been attached before workmen cut them all off in June 2015.

The Pont des Arts, built 1802–1804 under Napoleon, was the first bridge in Paris made of what?

Its engineers wanted it to resemble a suspended garden with trees and benches, and crossing cost one sou.

The lavishly ornamented Pont Alexandre III is named after a tsar of which country?

His son Nicholas II laid the foundation stone in 1896 to celebrate the Franco-Russian Alliance, and it opened for the 1900 World's Fair.

The gilt-bronze Fames atop the Pont Alexandre III's pillars restrain which mythical creature?

The 17-metre masonry socles act as counterweights for the single steel arch, which was kept low to preserve views of the Invalides.

Thanks to the bouquinistes, the Seine is called the only river in the world that runs between what?

Around 240 of them use some 900 boxes holding roughly 300,000 books along more than three kilometres of riverbank.

Why did the booksellers first set up along the Seine's banks in the 18th century?

Itinerant sellers had worked the bridge since the early 1600s until the Council of State's 1756 ban pushed them onto the quais.

The excursion boats known as Bateaux Mouches take their name from what?

The literal translation is 'fly boats', but the name comes from the Mouche boatyards; the trademark belongs to a company founded by Jean Bruel.

A Viking army sailed up the Seine and sacked Paris in which year?

Its chieftain Reginherus may have been the semi-legendary Ragnar Lothbrok; Rollo led another attack up the river in 885.

Which last Grand Master of the Knights Templar was burned in 1314 on a Seine island?

King Philip IV had the order suppressed after borrowing heavily from it.

After her burning in 1431, whose ashes were reportedly thrown into the Seine from a bridge at Rouen?

The Mathilde Bridge story is repeated in many accounts, though rival claims about the ashes persist.

Which American first successfully tested his steamboat on the Seine beside the Tuileries in 1803?

His 66-foot boat managed three to four miles per hour against the current, four years before his Hudson River success.

During the Second World War, the Allies aimed to reach the Seine how many days after D-Day?

The target was met, and the expected assault crossing never happened because German resistance collapsed in early September 1944.

Swimming in the Seine was banned in which year, a prohibition that lasted almost a century?

Jacques Chirac called for the ban to be lifted in 1988, but it took a €1.4 billion 'Swimming Plan' before the river reopened in July 2025.

Which Paris mayor swam in the Seine in July 2024 to show it was clean?

President Macron had also pledged to swim; the Olympic triathlon was still delayed a day by water quality concerns.

By the 1970s pollution had cut the number of fish species in the Seine near Paris to how many?

Around 60% of urban sewage flowed in untreated then; by the early 2020s the count had rebounded to 32 and Atlantic salmon had returned.

At the 1900 Olympics the Seine hosted which events?

The rowing returned in 1924 at the Bassin d'Argenteuil north of Paris.

Roughly how many boats and barges took part in the 2024 Olympic opening ceremony parade on the Seine?

It was the first opening ceremony held outside a stadium since the 2018 Youth Olympics in Buenos Aires.

Who closed the 2024 opening ceremony by singing Édith Piaf's 'Hymne à l'amour' from the Eiffel Tower?

Lady Gaga had opened the show earlier from the riverbank with dancers waving pink ostrich-feather fans.

Which mayor launched Paris-Plages, the Seine's summer artificial beaches, in 2002?

It began with a single beach on the Right Bank and topped four million visitors by 2007.

UNESCO added the banks of the Seine in Paris to its World Heritage list in which year?

The listing covers both the Rive Gauche and Rive Droite through the historic centre.

Which 1872 Monet harbour scene, painted at his hometown port on the Seine's mouth, named an entire art movement?

Le Havre's post-war centre, rebuilt by Auguste Perret, is itself a UNESCO World Heritage Site.

What is the Seine's average depth in central Paris, after 19th-century locks raised it?

Roughly 9.5 metres. Before locks were installed in the 1800s it was far shallower, a narrow channel between sandy banks.

Which river joins the Seine at Charenton-le-Pont, just upstream of central Paris?

The Oise comes in downstream at Conflans-Sainte-Honorine, and the Yonne meets the Seine at Montereau-Fault-Yonne.

Which phenomenon, 'le mascaret' in French, did 1960s dredging mostly end on the lower Seine?

The Seine Maritime below Rouen is tidal and once produced a wave that surged upriver.

The Seine features prominently in 'Our Last Summer', a 1980 song by which group?

Vanessa Paradis and Matthieu Chedid later sang 'La Seine' for the 2011 animated film A Monster in Paris.

At which port city does the Seine reach the English Channel?

Honfleur sits on the left bank of the estuary, and the tidal Seine Maritime runs 123 km up to Rouen.

The return of which fish to the Seine was announced in 2009 after decades of pollution?

By the early 2020s the number of fish species near Paris had rebounded to 32, from a low of three.

Which Paris mayor and future president first called in 1988 for lifting the Seine swimming ban?

The ban dated from 1923; Anne Hidalgo finally swam in the river in July 2024 ahead of the Olympics.

How much did the 'Swimming Plan' launched in 2018 to clean the Seine for the Olympics cost?

It included a basin to store rainwater and release it slowly into the sewers, preventing the overflows that pollute the river.

The mouth of which river at Conflans-Sainte-Honorine ends the canalised Basse Seine section?

Four large multiple locks lie between Rouen and that junction, then smaller locks at Bougival and Suresnes lift vessels to Paris level.

The abandoned 19th-century Canal de la Haute-Seine once let vessels continue upstream to which city?

The canal has been disused since 1957; today only small craft can reach Marcilly-sur-Seine, 516 km from the mouth.