In addition to the Palace of Versailles, there is also an Eiffel Tower and a triumphal arch in Paris that Ye Chao wants to see.

The Eiffel Tower stands on the Champ de Mars in Paris, France, on the south bank of the Seine, and was built in 1889 after the famous architect and structural engineer Gustave Eiffel who designed it, and was built entirely by Schneider Iron (now Schneider Electric).

It is a world-famous building, one of the symbols of French culture, one of the landmarks of the city of Paris, and the tallest building in Paris. Affectionately known as the "Iron Lady" by the French.

With a height of 300 meters and an antenna height of 24 meters, the Eiffel Tower is made up of a number of scattered steel components that look like a pile of model components. There are 18,038 steel components, weighing 10,000 tons, and a total of 7 million holes were drilled during construction, making 12,000 metal parts and 2.5 million rivets.

Except for the four legs, which are made of reinforced concrete, the whole body is made of steel, and 7,300 tons of wrought iron are shared. The tower is divided into three floors, respectively at 57.6 meters, 115.7 meters and 276.1 meters above the ground, of which there are restaurants on the first and second floors, and there is an observation deck on the third floor, with a total of 1,711 steps from the tower base to the top of the tower.

The Eiffel Tower was visited by about 6.98 million people in 2011 and more than 270 million visitors in 2010, generating 1.5 billion euros in tourism revenue for Paris every year.

In 1880, France had just escaped the humiliation of the Franco-Prussian War, and in order to show its national strength, in 1884, the French parliament decided that from May 5 to November 6, 1889, Paris, France would once again host the World Expo, with the theme of celebrating the 100th anniversary of the victory of the French Revolution.

In May 1886, the French government invited a global tender for the construction of the World Expo, designing a tall tower on the Champ de Mars in Paris. There are two conditions: the tower will attract visitors to buy tickets, and it will be easily demolished after the Expo.

The structure of the Eiffel Tower is both intuitive and simple: at the base are four massive inclined column piers distributed on 128 m long bases on each side, with an inclination angle of 54°, supported by the first platform at a height of 57.63 m; Between the first platform and the second platform at a height of 115.73m are 4 slightly curved columns.

The next four upward columns are transformed into almost vertical, stiff obelisks, with a third platform at a height of 276.13m. At a height of 300.65m is the top platform of the tower, which is arranged with a television antenna.

The total weight of the tower is 10,000 tons, and the weight is borne by four solid caisson foundations that extend straight to the subterranean bearing soil layer. In June 1884, Emilenouguier and Mauiricekoechlin, two of the leading engineers of the Eiffel design firm, had the idea of designing a supertall tower.

The preliminary design resembles a massive pylon, with four legs made of lattice beams, supported separately on the foundation and brought together at the top of the tower, connected by equally spaced beams.

In order to be more pleasing to the public's evaluation, it is proposed to decorate the base of the tower with a stone pedestal, connect the four tower columns with the first platform with a monumental arch structure, and set up a large glass-walled hall on each platform, and use decorative techniques such as spherical modeling to brighten the structure at the top.

In the subsequent designs, the engineers further refined some design ideas, such as the giant arch, and gave the tower a very personal expression. In addition, the setting of the beam has been simplified and coordinated with the alignment of the tower column after optimization, so that the tower structure is more simple and agile, the form is more beautiful, and the momentum of the tower is stronger.

The four large arches at the bottom of the first platform connecting the inclined column piers were originally used for decoration, and some people think that these four arches destroyed the linearity, simplicity and "honesty" of the tower structure, and also damaged the beauty of the tower body, but in fact this "pseudo-arch" has been recognized as a basic part of the shape of the tower body.

If the beams simply link the four pillars together, then the setting of the giant arch unites the towers into the tower as a whole. Moreover, the curvilinear shape of the ornamental arch is also in harmony with the curvilinear alignment of the tower columns.

It can also be seen from the figure that the decorative arch of the leaning tower column and the horizontal beam also has a certain structural function, although the arch does not bear the vertical load that the tower column transmits downward, but the connection between the tower column and the beam is strengthened, and the force flow between the beam and the inclined tower column under the action of horizontal load is smoother.

As can be seen from the preliminary design drawings of the tower, the connection between the lower beam and the tower column also shows the idea of curve transition at the joint, but under the suggestion of the architect, through continuous optimization, the structure is more fully expressed, and the overall form is more unified.

The Eiffel Tower was designed by Gustave Eiffel, who was born in 1832 in the city of Dijon in eastern France. At the age of 20, he was admitted to the French National School of Technology, which trains engineers, with excellent grades.

There, he rented a bachelor's dormitory, often huddled all night between the table and the stove, and immersed himself in reading. Soon after, he received his diploma as an engineer with good grades. After graduating, Eiffel was introduced by a friend to work as an engineer in the research office of the Western Railway Bureau.

Since then, Eiffel has embarked on a career as a structural engineer and contributed his outstanding talents to the progress and civilization of mankind.

In 1860, Eiffel completed the construction of the then famous Bordeaux Bridge in France, erecting 500 meters of steel elements on six piers across the Gillon River. The completion of this monumental project has made Eiffel famous in the entire engineering community.

Eiffelken delved into research, dared to innovate, and boldly used steel and concrete, freeing civil engineering architecture from "earth" and "wood". He put in a lot of labor to design the tower, and there are more than 5,000 design drawings alone.

These valuable materials, the result of Eiffel's labor, are still well preserved in Paris.

At 300 meters tall and the antenna 24 meters high, the equivalent of a 100-story building, the Eiffel Tower is made up of many scattered steel components that look like a bunch of mock-up components. There are 18,038 steel components, weighing 10,000 tons, and a total of 7 million holes were drilled and 2.5 million rivets were used during construction.

In addition to the four legs are made of reinforced concrete, the whole body is made of steel, and the total weight of the tower is 7,000 tons. Paint every 7 years, 52 tons of paint each time. The tower is divided into three floors, respectively at 57.6 meters, 115.7 meters and 276.1 meters from the ground, of which there are restaurants on the first and second floors, and there is an observation deck on the third floor, with a total of 1,711 steps from the tower base to the top of the tower, sharing 7,000 tons of steel, 12,000 metal parts, and 2,590,000 rivets.

The French say that the Eiffel Tower is "the watchtower of the capital", and it is.

It has three observation towers, upper, middle and lower, which can accommodate tens of thousands of people at the same time.

For more than a century, about 3 million people have climbed to the top of the tower every year to take in the breath of Paris.

The observation deck on the top floor is 274 meters above the ground, and it takes about an hour to climb the 1652 steps, but you can also use the elevator to climb it.

It is best viewed from afar, as it gives the impression that the noisy Paris has suddenly fallen silent and becomes a huge map, with countless lines of different widths drawn by the avenues and alleys. The whole of Paris is at your feet, and when you have a clear view during the day, you can see 60 kilometers away.

The meso-level observation deck is 115 meters above the ground. Some say that looking out from this level has the best view.

Indeed, the pale yellow Arc de Triomphe, the Louvre in the shade of greenery, and the white Sacré-Coeur church in Montma are all clearly visible and colorful. Climb the tower in the evening, then see the night is picturesque, the lights are like brocade, the green reflects the shade of the trees, those street lamps that are intertwined like a net, really like a bead net after the rain, the grains are crystal clear.

There is also a well-decorated panoramic restaurant on this floor, which is full of customers all year round, and seats must be reserved in advance.

The observation deck on the lowest floor is the largest and quite spacious, and has a variety of services such as conference halls, movie halls, restaurants, shops, and a post office.

In the crowd of people, it seems to be in the middle of a busy city, and forget that it is 57 meters in the air after all.

It's best to get a close-up view from here.

The Palais de Charlotte with its splashing fountain to the north, the Seine River flowing quietly at the foot of the tower, the large lawn of the Champ de Mars to the south and the old buildings of the Aédémière de France make for an unforgettable landscape.

The Eiffel Tower, built in metal for the World's Fair, was the world's tallest building for 45 years, until the Chrysler Building.

It is held in place by 2.5 million rivet connections, and it is said that its pressure on the ground is only as large as that of a normal adult sitting in a chair. On the four sides of the tower, the names of 72 scientists are inscribed, all of whom are engaged in research to protect the tower from destruction.

The Eiffel Tower, along with Tokyo Tower and the Empire State Building, are known as the "Three Famous Western Buildings".

The Eiffel Tower is one of the symbols of Paris and is affectionately known as the "Iron Lady" by the French.

Ye Chao climbed the tower and watched the scenery of Paris......

For this Iron Lady who can make money, everyone loves it. That's 1.5 billion euros a year.