Al-Muradi
Alī Ibn Khalaf al-Murādī, was an Andalusian mathematician and astronomer who belonged to the scientific circle of Ṣāʿid al- Andalusī.
He was the author of the technological manuscript entitled Kitāb al-asrār fī natā'ij al-afkār. It was copied and used at the court of Alfonso VI of León and Castile in Christian Spain in the 11th century.
The manuscript provides information about a "Castle and Gazelle Clock" and many other forms of complicated clocks and ingenious devices. Al-Muradi was a contemporary of Abū Ishāq Ibrāhīm al-Zarqālī.
In 2008, the Book of Secrets of al-Muradi has been published in facsimile, translated in English/Italian/French/Arabic and in an electronic edition with all machines interpreted in 3D, by the Italian study center Leonardo3.
He also devised, with help from al-Zarqali, the universal astrolabe. Both al-Muradi and al-Zarqali's design were included in the Libros del Saber of Alfonso X of Castile.
