    __notoc__ year 829 (dcccxxix) was a common year starting on friday (link will display the full calendar) of the julian calendar. == events == === by place === ==== europe ==== * egbert of wessex conquers mercia and is recognized as bretwalda. * the saracens ravage the coast of dalmatia. * oldest known mention of the city of wiesbaden (approximate date). * the synod of mainz is held. * the bulgarians conquer slavonia. * the croats are not under frankish rule anymore. ==== byzantine empire ==== * theophilos succeeds michael ii as emperor of byzantium. * the cretan saracens annihilate a byzantine fleet at the battle of thasos, and raid freely across the aegean. ==== egypt ==== * the nile freezes over.lamb, h. h. (1977) climate: present, past and future: climatic history and the future vol 2, methuen and co. ltd., london. ==== asia ==== * the bai kingdom of nanzhao captures the city of chengdu in sichuan province, china. === by topic === ==== religion ==== * ansgar is appointed missionary to sweden by louis the pious, at the request of the swedish king bjÃ¶rn at haugi. == births == * september 8 &ndash; imam ali al-hadi, shia imam == deaths == *october 2 &ndash; michael ii, byzantine emperor (b. 770) == references ==  
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