Overview

In 293 a gauge was erected on the Tigris spanning both banks, twenty-five cubits long — a round mark at every cubit and a square mark every five cubits inscribed in iron, by which the measure of the rises was known ¹.

The Nizamiyya Madrasa of Baghdad

The Nizamiyya of Baghdad, first and most famous of the madrasas founded by the vizier Nizam al-Mulk al-Tusi: building began in 457 and sisters rose at Nishapur, Isfahan, Herat, Basra, Mosul and Amid; the Imam al-Haramayn al-Juwayni then Abu Ishaq al-Shirazi taught in it, and it mothered the Sunni institutional model that the later madrasas of Baghdad followed — the caliphs prayed there and Nizam al-Mulk himself visited to inspect its library.

Setting Up the Gauge on the Tigris

At a glance

In time

In space

Overview

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Time

The Nizamiyya Madrasa of Baghdad