The Radekan Tower, built in the 13th century, is located in the Iranian province of Khorasan-Rezavi. For many years it was considered a tomb, but in recent years, archaeologists have found that it is an ancient observatory, built by the outstanding Iraqi astronomer Nasir al-Din Tusi.
It is believed that in it he made calculations of the diameter of the Earth and the motion of the planets in the solar system. The tower has 12 walls corresponding to 12 months of the year, with each part of the wall having an angle of 30 degrees.
Also in the upper part of the wall there are 365 vertical lines that divide the tower into 36 sectors, each of which is 10 degrees. The tower doors are built opposite the sunrise points at the winter solstice and the sunset at the summer solstice.
It is curious that Nasir ad-Din Tusi at one time put forward a new theory of the motion of stars and was in many ways ahead of European scientists. For example, back in the 13th century, he believed that light is made of particles.
Let me remind you that we also talked about mysterious tanks on Assyrian bas-reliefs.
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Natalia Trubinovskaya