Complex sentence: The site of Belfort was inhabited in Gallo-Roman times and was subsequently recorded in the 13th century as a possession of the counts of Montbéliard, who granted it a charter in 1307.
Split into simpler sentences: The site of Belfort was inhabited in Gallo-Roman times. It was subsequently recorded in the 13th century as a possession of the counts of Montbéliard, who granted it a charter in 1307.