Benghazi is the second-most-populous city in Libya as well as the largest city in Cyrenaica, with an estimated population of 859,000 in 2023. Located on the Gulf of Sidra in the Mediterranean, Benghazi is also a major seaport. A Greek colony named Euesperides had existed in the area from around 525 BC. In the 3rd century BC, it was relocated and refounded as the Ptolemaic city of Berenice.