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Alemanni and Franks lived there, and by 794, Charlemagne presided over an imperial assembly and church synod, at which "Franconofurd" (alternative spellings end with -furt and -) was first mentioned. It was one of the two capitals of Charlemagne's grandson Louis the German, together with Regensburg. Louis founded the collegiate church, rededicated in 1239 to Bartholomew the Apostle and now Frankfurt Cathedral.