Bisceglie is a town and comune on the Adriatic Sea, with a population of c. 54,000, in the province of Barletta-Andria-Trani, Apulia, southern Italy. According to a theory, in Roman times there would have been a settlement here called Vigiliae. The modern city was founded by the Normans in the 11th century and enlarged under the Aragonese dynasty of Naples in the 15th century.