Facts about Paris

1. 08

   During the 1920s, Paris's sewage system processed approximately 400,000 cubic meters of wastewater daily through a network of underground channels designed by engineer Eugène Belgrand.

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2. 07

   Approximately 1,800 kilometers of underground tunnels crisscross beneath Paris, creating a hidden city used for water management, sewage, and infrastructure since medieval times.

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3. 06

   Notre-Dame Cathedral's construction took 182 years to complete, spanning from 1163 to 1345 during the medieval period in Paris.

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4. 05

   Arc de Triomphe's central arch measures 50 meters tall and 45 meters wide, making it one of the world's largest triumphal arches when completed in 1836.

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5. 04

   Catacombs beneath Paris hold the remains of approximately 6 million people, created from limestone quarries that supplied stone for the city's buildings since Roman times.

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6. 03

   Over 30 million tourists visited Paris in 2019, making it the world's most visited city by international arrivals.

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7. 02

   In 1889, the Eiffel Tower contained approximately 18,000 metallic parts held together by 2.5 million rivets.

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8. 01

   The Eiffel Tower's iron structure expands up to 15 centimeters in height during hot summer days due to thermal expansion.

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