An astrolabe is a primitive angle-measuring tool. It can be used to - very in-exactly! - measure the altitude above the horizon of a celestial body like the Sun, Moon or Polaris in order to calculate your position.
Medieval gunners used the astrolabe to calculate the height of towers and buildings, in order to more accurately aim their cannons.
<span>Queen victoria's government have a positive effect on Great Britain for she established the current role of the Britain's monarchy than any other ruler or political party. Queen Victoria became an influential person in spreading elite values as the Victorian era is known as a prestige era.</span>
I think it's her grandmother
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Leonardo da Vinci was famous for his designs, art, cartography, geology, and studies. Leonardo's designs later helped us to invent things like the tank, parachute, helicopter and many other things. He was also a very talented artist. Most of his pictures and paintings are in art galleries and museums.
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