Double spiral staircase /kloc-A castle built for King Francis I of France in the 6th century. Like the stairs of the Vatican Art Museum, it is a two-way staircase. It is said that the designer is Leonardo da Vinci, a good friend of the king.

The two wings of the L-shaped building are engraved with the names of the king and prince who built the castle. Facing the atrium, the first thing you see is the Francois I staircase in the center. On this spiral staircase. The symbol of the king was carved in many places. Although this staircase is generally Gothic, its details are strongly influenced by the Italian Renaissance artistic style. This staircase, named Francois I, was built on the eve of the completion of the Chambord Castle.

Secondly, Norway built a bridge designed by Leonardo da Vinci.

101October 3 1 day, the Queen of Norway and more than 500 guests from all walks of life cut the ribbon for a unique bridge in the cold wind and drizzle in northern Europe. Helicopters hover over people's heads, cranes slowly lift 48,000 square feet of white cloth, and a wooden bridge with a length of 100 meters and a height of 8 meters is displayed in front of everyone. Three light-colored wooden arches, like three hard bows pulled back by the shooter, firmly support the bridge. Incredibly, the designer of this bridge was Leonardo da Vinci 500 years ago. For this reason, the bridge was named "Mona Lisa".

1502, Leonardo da Vinci drew a wonderful sketch of arch bridge design for Istanbul, Turkey, which spans two continents. The bridge is 346 meters long and spans the Bosphorus. If it can be built, it will be the longest bridge in the world at that time. But the Sultan of Turkey refused to build the bridge. He thought it was too difficult and expensive. Therefore, the bridge stayed on the drawing for 500 years.

1995, Norwegian artist Vebjoern Thornton came across this design sketch. He recalled: "The first time I saw her, I was conquered by her exquisite appearance. She is the perfect combination of function and aesthetics. " Through various efforts, Sander finally persuaded the Norwegian Highway Administration that the principle of Leonardo da Vinci's design of the bridge was completely established and the bridge could be built. After investigation, the location of the bridge is determined to be Australia, more than 30 kilometers south of Oslo, Norway, just adjacent to the European highway 18 from Stockholm to Oslo.

At present, the cost of the completed footbridge is $65,438+0,360,000. Except for the stainless steel handrails, it is completely made of wood. In fact, Leonardo da Vinci's design was made of stone, but the Norwegians thought that stone was too expensive, so they changed the material for building the bridge to wood.

It is reported that this is the first time that leonardo da vinci's architectural design has been put into practice, and this design is a classic example of aesthetics and design. Thornton proudly said, "Five centuries ago, people thought it was impossible to build this bridge, but we built it. We have successfully proved that the principle of Da Vinci's design of this bridge is feasible. " Sander said that he still has a dream, "We want to promote this kind of bridge all over the world so that every continent can build the Mona Lisa Bridge".

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