Al-Wathiq 1 was caliph from 842 to 847; son and successor of al-Mu`tasim 1: Shaban, Islamic History, pp. 69-71. He was known as Harun (H'rwn): Chron. 1234 §§223, 226, 228. He was the caliph under whom perished the Forty-Two Martyrs of Amorion (in 845). He was perhaps also the unnamed caliph who welcomed the rebel Karbeas 1 in 843 or 844: Theoph. Cont. IV 16 (p. 166), Scyl., p. 92. Son and successor as caliph of Abu Ishaq (al-Mu`tasim 1): Chron. 1234, §§223, 226 (II, p. 35) (in the year 1153 Sel., i.e. 842), 228 (II, p. 39). Son of the caliph al-Mu`tasim 1, he succeeded his father and reigned for five years and nine months; he began to reign in the year 1155 Sel. (843/844), the same year as Michael III (Michael 11) became Roman emperor; he received a Roman embassy and agreed terms of peace and an exchange of prisoners: Bar Hebr., p. 140. He died and was succeeded by his brother al-Mutawwakil 1 in AH 231 (September 845/August 846): Bar Hebr., p. 141.

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