City of Paris Inaugurates La Canopée at Les Halles

Architecture09/20/2026@BuildDesk

Starts 04/01/1867ESTIMATED 73% CONFIDENCE159.5 years agoThe Paris^[3] sewer museum's own history page states tours "began in 1867, during the World's Fair" without naming an exact day, so the pin uses the Fair's opening date.

During the 1867 Exposition Universelle, Paris opened Baron Haussmann's newly rebuilt sewer network to public tours for the first time, turning Eugène Belgrand's engineering into a civic showcase.

0.60

Tour Triangle Is Delivered at Porte de Versailles

1 Place de la Porte de Versailles, 15th arrondissement, Paris, France

Unibail-Rodamco-Westfield

Tour Triangle Is Delivered at Porte de Versailles

Starts 01/01/2027DELAYED1 day late40% CONFIDENCEin 100 daysFrance 3's site visit reports the tower is "au niveau du 35e etage... pour une livraison finale debut 2027" - final delivery in early 2027, a season rather than a date.^[1]

Herzog & de Meuron's 180-metre glass wedge holds 44 floors of offices, a hotel and a restaurant on the edge of the Parc des Expositions, and is the first high-rise built inside Paris in about 40 years. Unibail-Rodamco-Westfield started work at the end of 2021 and is fitting out the EUR 700 million tower for its final handover.

€700M

0.59

Paris Métro Opens Its First Line

Porte Maillot, Paris, France

RATP

Starts 07/19/1900CONFIRMED 85% CONFIDENCE126.2 years agoRATP's^[3] own history page and EarthSky's^[2] science-history article both give 19 July 1900 as the inauguration date of the first métro line.

The Paris Métro's first line opened to the public on 19 July 1900, running between Porte Maillot and Château de Vincennes.

0.58

Eiffel Tower's Rust-Fighting Repaint Unveiled for the Paris Olympics

Eiffel Tower, Paris, France

Weather09/21/2026@ClimateDesk

Eiffel Tower's Rust-Fighting Repaint Unveiled for the Paris Olympics

Starts 06/07/2024CONFIRMED 90% CONFIDENCE2.3 years agoHappened as dated, per the source^[1]: "The Eiffel Tower is sporting a new set of rings — the five Olympic rings, to be exact".

Paris unveiled the Eiffel Tower in its original 1907 gold-brown shade in June 2024, weeks before hosting the Olympic Games, after a repaint cut back from about a third of the ironwork to roughly 5 per cent.

$60M

0.56

Storm Daniel Bursts the Derna Dams

Derna, Libya

Starts 09/11/2023CONFIRMED 92% CONFIDENCE3.0 years agoThe source^[1] dates the dam failure to the early hours of 11 September: "Residents recalled hearing loud explosions at the time the dams burst, with video showing the flood reaching Derna shortly before 03:00 EET on 11 September", after the storm made landfall near Benghazi on 10 September.

Two dams above Derna failed in the early hours, sending the Wadi Derna through the city. Over 5,900 died and at least 8,000 more were missing in the deadliest Mediterranean tropical-like cyclone on record.

0.56

Sports09/21/2026@SportDesk

The Champions League Final at the Metropolitano

Riyadh Air Metropolitano, Avenida de Luis Aragones 4, 28022 Madrid, Spain

UEFA

The Champions League Final at the Metropolitano

Starts 06/05/2027SCHEDULED 85% CONFIDENCEin 255 daysUEFA^[2] fixed the host and date years ahead: the final "will be played at the Estadio Metropolitano in Madrid, Spain, on 5 June 2027".

Europe's club season ends in Madrid. The Estadio Metropolitano, Atletico Madrid's home since 2017, hosts the Champions League final for the second time after 2019, when Liverpool beat Tottenham there.

0.55

Gustave Eiffel’s Company Completes the Eiffel Tower

Eiffel Tower, Champ de Mars, Paris, FranceCompagnie des Établissements Eiffel

Starts 03/31/1889CONFIRMED 80% CONFIDENCE137.5 years agoHistory.com^[3] and the Eiffel Tower’s own history page date the structure’s completion and dedication ceremony to 31 March 1889.

Gustave Eiffel’s engineering firm finished the Eiffel Tower in Paris after just over two years of construction, built as the entrance arch for the 1889 Exposition Universelle. The 300-metre iron lattice tower was the tallest man-made structure in the world at the time.

0.55

Grand Paris Express Line 15 South Opens

Paris, FranceSociété des Grands Projets

Starts 10/01/2026ESTIMATED 58% CONFIDENCEin 8 daysGiven as a target, not a fixed date, per the pin description: "…omated orbital metro ring around Paris. Estimated date.…"

The first stretch of Europe's largest transport project: a 33 km automated orbital metro ring around Paris. Estimated date.

€42B

0.54

Grand Paris Express Line 15 South Pushed to Autumn 2027

Pont de Sèvres, Boulogne-Billancourt, Île-de-France, FranceSociété des Grands Projets

Starts 09/30/2027DELAYED7 years late56% CONFIDENCEin 1.0 yearsGiven as scheduled, per the source^[1]: "In autumn 2027, the South Line 15 should be up and running between Pont de Sevres and Noisy-Champs."

The first section of Line 15, the 76km ring at the heart of the Grand Paris Express, has slipped repeatedly and is now expected to open between Pont de Sevres and Noisy-Champs in autumn 2027.

$45B

0.54

Aerospace09/21/2026@BuildDesk

Grand Paris Express Line 17 Complete

Le Bourget, France

Starts 06/01/2030ESTIMATED 66% CONFIDENCEin 3.7 yearsGiven as a target, not a fixed date, per the pin description: "…e Airport and the Parc des Expositions. Estimated date.…"

The northern radial of the Paris super-metro, running out to Charles de Gaulle Airport and the Parc des Expositions. Estimated date.

0.54

The Paris Air Show Returns to Le Bourget

Paris–Le Bourget Airport, Le Bourget, France

GIFAS

The Paris Air Show Returns to Le Bourget

06/14/2027 - 06/20/2027SCHEDULED 80% CONFIDENCEin 264 daysStated as fixed, per siae.fr^[1]: the show’s own site gives its dates as "14•20 JUNE 2027".

The largest aerospace exhibition in the world, held in odd years at Paris–Le Bourget since 1953 and first staged in 1909, runs 14 to 20 June 2027 – four days for professionals, then three open to the public.

0.54

Architecture09/14/2026@BuildDesk

Co-Owners Scrap the €800M Tour Montparnasse Overhaul

Tour Montparnasse, Paris, France

Starts 07/21/2026CONFIRMED 85% CONFIDENCE64 days agoHappened as dated, per the source^[1]: "co-owners of the tower voted to scrap the ambitious transformation" at a 21 July 2026 general assembly.

Ten years after Paris approved Nouvelle AOM's full glass-facade transformation of the Tour Montparnasse, the tower's co-owners voted to abandon that plan in favour of a smaller, cheaper intervention.

€800M

0.61

Infrastructure09/15/2026@BuildDesk

City of Paris Opens Its Sewers to Public Tours During the 1867 World's Fair

93 Quai d'Orsay, 75007 Paris, France

Architecture09/20/2026@BuildDesk

During the 1867 Exposition Universelle, Paris opened Baron Haussmann's newly rebuilt sewer network to public tours for the first time, turning Eugène Belgrand's engineering into a civic showcase.

0.60

Tour Triangle Is Delivered at Porte de Versailles

1 Place de la Porte de Versailles, 15th arrondissement, Paris, France

Unibail-Rodamco-Westfield

€700M

0.59

Paris Métro Opens Its First Line

Porte Maillot, Paris, France

RATP

The Paris Métro's first line opened to the public on 19 July 1900, running between Porte Maillot and Château de Vincennes.

0.58

Eiffel Tower's Rust-Fighting Repaint Unveiled for the Paris Olympics

Eiffel Tower, Paris, France

Weather09/21/2026@ClimateDesk

Starts 06/07/2024CONFIRMED 90% CONFIDENCE2.3 years agoHappened as dated, per the source^[1]: "The Eiffel Tower is sporting a new set of rings — the five Olympic rings, to be exact".

$60M

0.56

Storm Daniel Bursts the Derna Dams

Derna, Libya

0.56

Sports09/21/2026@SportDesk

The Champions League Final at the Metropolitano

Riyadh Air Metropolitano, Avenida de Luis Aragones 4, 28022 Madrid, Spain

UEFA

Starts 06/05/2027SCHEDULED 85% CONFIDENCEin 255 daysUEFA^[2] fixed the host and date years ahead: the final "will be played at the Estadio Metropolitano in Madrid, Spain, on 5 June 2027".

0.55

Gustave Eiffel’s Company Completes the Eiffel Tower

Eiffel Tower, Champ de Mars, Paris, FranceCompagnie des Établissements Eiffel

Starts 03/31/1889CONFIRMED 80% CONFIDENCE137.5 years agoHistory.com^[3] and the Eiffel Tower’s own history page date the structure’s completion and dedication ceremony to 31 March 1889.

0.55

Grand Paris Express Line 15 South Opens

Paris, FranceSociété des Grands Projets

Starts 10/01/2026ESTIMATED 58% CONFIDENCEin 8 daysGiven as a target, not a fixed date, per the pin description: "…omated orbital metro ring around Paris. Estimated date.…"

The first stretch of Europe's largest transport project: a 33 km automated orbital metro ring around Paris. Estimated date.

€42B

0.54

Grand Paris Express Line 15 South Pushed to Autumn 2027

Pont de Sèvres, Boulogne-Billancourt, Île-de-France, FranceSociété des Grands Projets

The first section of Line 15, the 76km ring at the heart of the Grand Paris Express, has slipped repeatedly and is now expected to open between Pont de Sevres and Noisy-Champs in autumn 2027.

$45B

0.54