Al-Zarqali
c. 1029 CE–c. 1100 CE · Toledo (Castile)
Abu Ishaq Ibrahim ibn Yahya al-Zarqali (Latin: Arzachel) was an astronomer and instrument-maker of al-Andalus (Muslim Spain), active in the eleventh century. He is also called al-Naqqash, "the engraver," and tradition holds that he rose from a family of skilled metalworkers — his manual craft, rather than book-learning, is said to have first brought him into scientific circles. His exact birthplace is debated: some sources place him in Cordoba, others in a village near Toledo.
In Toledo he joined the circle of the judge and scholar Sa'id al-Andalusi, working under the patronage of the city's rulers (the Banu Dhi'l-Nun, including al-Ma'mun). There he built astronomical instruments and water-clocks and, with collaborators, carried out the observations behind the Toledan Tables — a set of astronomical tables that, once translated into Latin, shaped European astronomy for over two centuries. He also designed a "universal" flat astrolabe, known in Latin as the Saphaea Arzachelis, usable at any latitude.
Modern scholars credit him with a refined model of the planet Mercury in which the relevant geometric path is oval, "like a pine nut." Some popular accounts call this an anticipation of Kepler's ellipses; specialists caution this is an overstatement — he did not propose sun-centered elliptical orbits. After Toledo fell to Christian Castile in 1085, he is reported to have moved to Cordoba, where recent research dates his death to 15 October 1100 (an older estimate of c. 1087 rested on his last recorded observations).
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Toledo (Castile)טולדוCastile, Spain
What they did here
His documented career centers on Toledo, where (from roughly 1048 onward) he served the judge-scholar Sa'id al-Andalusi and the city's ruling Banu Dhi'l-Nun (including al-Ma'mun), building astronomical instruments and water-clocks. Here he conducted the observations behind the Toledan Tables and developed the universal astrolabe (the Saphaea). His Mercury model with an oval ('pine-nut') path is also placed in this Toledan period, c. 1080-81.
About Toledo (Castile)
# Toledo, Castile (1437–1575) Toledo in the fifteenth and sixteenth centuries stood as one of Christendom's jewels, perched dramatically on a hilltop surrounded on three sides by the Tagus River, while Christian Castilian kings ruled from their throne. The city's climate swung sharply—scorching summers that sent residents to shaded courtyards, winters that froze the winding streets carved into stone. Though Christian conquest had transformed the peninsula centuries before, Toledo's Jewish quarter remained a vital enclave, home to physicians, scholars, administrators, and merchants who served the royal court and conducted vigorous trade. The community, though diminished from its medieval heights, produced towering halakhic authorities whose writings would shape Jewish practice for centuries; yeshivas hummed with Talmudic debate while Jewish families lived in proximity to Arab and Christian neighbors in this cosmopolitan triangle of faiths. The city itself was famous across Europe for its damascene metalwork and sword-making, its narrow alleys climbing impossibly steep hillsides, and its cathedral dominating the skyline—yet Toledo remained an intellectual crossroads where Jewish scholars could still gather, write, and establish precedents that would guide diaspora communities long after political upheaval would force the final exiling of Spain's Jews.
In the same place & time
Sages whose lives overlapped with Al-Zarqali’s in the same cities, drawn from their recorded journeys.
Across the traditions
The world in their lifetime
Thinkers, teachers, and rulers whose lives overlapped with Al-Zarqali’s — a glimpse of the wider world they lived in. Drawn purely from recorded birth and death years.
Islamic world
- Ibn Abd al-Barr· 978 CE–1071 CE
- al-Qushayri· 986 CE–1072 CE
- al-Bayhaqi· 994 CE–1066 CE
- Ibn Hazm· 994 CE–1064 CE
- Shaykh al-Tusi· 995 CE–1067 CE
- al-Mu'ayyad fi'l-Din al-Shirazi· 1000 CE–1078 CE
- al-Khatib al-Baghdadi· 1002 CE–1071 CE
- Abu Ishaq al-Shirazi· 1003 CE–1083 CE
- al-Wahidi· 1003 CE–1076 CE
- Nasir Khusraw· 1004 CE–1088 CE
- Abdullah Ansari· 1006 CE–1089 CE
- Abu al-Hasan al-Hujwiri· 1009 CE–1072 CE
- Imam al-Haramayn al-Juwayni· 1028 CE–1085 CE
- al-Mustansir Billah· 1029 CE–1094 CE
- al-Baghawi· 1042 CE–1122 CE
- Nizar ibn al-Mustansir· 1045 CE–1095 CE
- Abu al-Mu'in al-Nasafi· 1046 CE–1114 CE
- Omar Khayyam· 1048 CE–1131 CE
- Hasan-i Sabbah· 1050 CE–1124 CE
- Al-Hariri of Basra· 1054 CE–1122 CE
- al-Ghazali· 1058 CE–1111 CE
- Ahmad al-Ghazali· 1061 CE–1126 CE
- al-Musta'li bi-Allah· 1074 CE–1101 CE
- al-Sarakhsi· –1090 CE
Scientists
Christian world
Hindu world
Jewish world
Graeco-Roman world
Rulers world
- Lady Six Monkey 'War Quechquemitl'· –1101 CE
- al-Mustansir Billah· 1029 CE–1094 CE
- William the Conqueror· 1028 CE–1087 CE
- Malik-Shah I· 1055 CE–1092 CE
- Alp Arslan· 1029 CE–1072 CE
- Anawrahta· 1014 CE–1077 CE
- Alexios I Komnenos· 1057 CE–1118 CE
- Vladimir Monomakh· 1053 CE–1125 CE
- Lord Eight Deer 'Jaguar Claw'· 1063 CE–1115 CE
- al-Qa'im· 1001 CE–1075 CE
- Emperor Renzong of Song· 1010 CE–1063 CE
- Barkiyaruq· 1080 CE–1105 CE
- Kilij Arslan I· 1079 CE–1107 CE
- Muhammad I Tapar· 1082 CE–1118 CE
Works
No works attributed in the corpus yet.