Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Maragheh observatory is an ancient astronomical observatory, which was established in 1259 by Nasir al-Din al-Tusi, an Iranian scientist and astronomer. Located in the heights west of Maragheh, East Azarbaijan province, Iran, it was once considered one of the most prestigious observatories in the world.