Wikipedia's first sentence called it “mechanical engineer and author of the unique technological manuscript entitled kitāb al-asrār fī natā'ij al-afk”. Today it says “andalusian engineer”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2020 one. Red dashes: removed from Wikipedia since.Pale dots: rewritten; the numbered note shows what it says now.Red text: written in or rewritten since the previous snapshot.1 tap a number or a side note to jump between them
The opening as it read in 2020
See Abu Jafar al-Muradi for the Egyptian grammarian.1Fragment of The Book of Secrets in the Results of Thoughts. 11th century Alī Ibn Khalaf al-Murādī , ( أبو جعفر علي ابن خلف المرادي ; 11th century) was an Andalusian mathematician and astronomer who belonged to the scientific circle of Ṣāʿid al- Andalusī .2 He was the author of the technological manuscript entitled Kitāb al-asrār fī natā'ij al-afkār ( , The Book of Secrets in the Results of Thoughts or The Book of Secrets in the Results of Ideas ). 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 .3 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 (1227) of Alfonso X of Castile . King, World-maps for finding the direction and distance to Mecca , (Brill, 1999), 330.4
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 945024512.
The opening as it stood in 2015
See Abu Jafar al-Muradi for the Egyptian grammarian. Alī Ibn Khalaf al-Murādī , (11th century) Al-Andalus , was a Mechanical engineer and author of the unique technological manuscript entitled Kitāb al-asrār fī natā'ij al-afkār ( The Book of Secrets in the Results of Thoughts ). 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 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 (1227) of Alfonso X of Castile . Technology in the service of progress: The examples of hydraulic technologies , Ahmed Djebbar, Arab-Muslim Civilization in the Mirror of Universal , ( UNESCO , 2010), 292, 300. King, World-maps for finding the direction and distance to Mecca , (Brill, 1999), 330.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 634377161.
The opening as it stood on October 6, 2023 5 passages from the previous snapshot no longer appear
Fragment of The Book of Secrets in the Results of Thoughts. 11th century Ibn Khalaf al-Murādī , ( أبو جعفر علي ابن خلف المرادي ; 11th century) was an Andalusian engineer. Al-Murādī was the author of the technological manuscript entitled Kitāb al-asrār fī natā'ij al-afkār ( , The Book of Secrets in the Results of Thoughts or The Book of Secrets in the Results of Ideas ). 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. In 2008, the Book of Secrets of al-Muradi was 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 .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1137633603.
The opening as it stood in 2025
Fragment of The Book of Secrets in the Results of Thoughts. 11th century Ibn Khalaf al-Murādī , ( أبو جعفر علي ابن خلف المرادي ; 11th century) was an Andalusian engineer. Al-Murādī was the author of the technological manuscript entitled Kitāb al-asrār fī natā'ij al-afkār ( Arabic : كتاب الأسرار في نتائج الأفكار , The Book of Secrets in the Results of Thoughts or The Book of Secrets in the Results of Ideas ). 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. In 2008, the Book of Secrets of al-Muradi was 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 .
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1255396051. This is our newest snapshot; the live article may have moved again since.
Today
Wikipedia's first sentence called it “mechanical engineer and author of the unique technological manuscript entitled kitāb al-asrār fī natā'ij al-afk”. Today it says “andalusian engineer”. Read the current article and compare.
2015
2020
Oct '23
2025
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What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2015, and today's defining sentence is their current revision.
Then
mechanical engineer and author of the unique technological manuscript entitled kitāb al-asrār fī natā'ij al-afk
Now
andalusian engineer
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.
