The knot is a non-SI unit that is accepted for use with the SI. Worldwide, the knot is used in meteorology, and in maritime and air navigationâfor example, a vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour.
Hagia Sophia (from the Greek: á¼Î³Î¯Î± ÏÎ¿ÏÎ¯Î±, Byzantine Greek [aËÊia soËfia]), Holy Wisdom; Latin: Sancta Sophia or Sancta Sapientia; Turkish: Ayasofya) was a Greek Orthodox Christian patriarchal basilica (church), later an imperial mosque, and now a museum (Ayasofya MÃ¼zesi) in Istanbul, Turkey.
But it was the dome that made Hagia Sophia the most complex building of antiquity. The shallow dome was made from 40 equally spaced ribs. Forty windows were then set at the dome's base, creating the sensation that the dome actually floated over the church. In 559 A.D., an earthquake tumbled the dome.