VIKINGS: WARRIORS AND TRADERS by Ruben Ygua
English | 2020 | ISBN: N/A | ASIN: B08BJWG71F | 61 pages | EPUB | 0.25 Mb
815- Following the tradition of the Franks, Ludwig the Pious divides the territory among his sons: Lothar is appointed co-emperor, Pepin receives Aquitaine and Ludwig, the youngest, settles in Bavaria and the surrounding regions. Ludwig the Pious crosses the Elbe River and attacks Denmark to restore Harald Klak to the throne, but is repelled by Horik I and carries out some looting during the retreat.
Ludwig continues Charlemagne’s defensive work in Friesland, Caligula’s old lantern is restored as part of the defenses. Spain: Count Bera rejects an attack by the Emir of Cordoba on Barcelona, belonging to the Franks. Abd al-Karim ibn Mugait attacks and conquers several Christian villages on the banks of the Naharon River, but the approach of a Christian army and torrential rains force him to abandon the campaign. Synod of Constantinople: Leo V forbids the cult of images confirms the iconoclastic theses and banishes Nicéphore, patriarch of Constantinople, naming Theodotus in his place. Al-Mamun brings the Abbasid Caliphate to its cultural peak, the alchemist Yabir discovers sulphuric and nitric acids, separates arsenic and antimony from sulphides and writes the treatise on chemistry Summa Perfectionis, and the mathematician Al-Jwarizm, from whose name the terms guarism and algorithm are derived, writes the Book of Reduction (Kitab al-Yabr: algebra) with the first algebraic slide rules.
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