Byblos, known anciently as Gubla and today as Jbeil, developed on Lebanon’s Mediterranean coast over one of the region’s longest settlement sequences. Neolithic communities occupied the site by the seventh millennium BCE, building houses and participating in farming, fishing, and exchange. Later Chalcolithic and Bronze Age settlement created temples, fortifications, tombs, and a harbor town. Because buildings were repeatedly replaced on the same ground, the excavated site presents superimposed foundations rather than an intact city from one remote era.

During the Bronze Age, Gubla maintained close relations with Egypt, exporting cedar timber and receiving royal gifts, prestige objects, and artistic influence. Local rulers governed a Canaanite city whose temples and elite burials evolved across centuries. The later Phoenician city participated in maritime networks and writing traditions. The Greek name Byblos became associated with papyrus and books, contributing ultimately to the word Bible, but this linguistic connection should not be confused with proof that writing or the biblical texts originated at the site.

Assyrian, Babylonian, Persian, Hellenistic, and Roman powers incorporated Byblos while local settlement continued. A Roman theater, streets, columns, and temples joined older sacred areas. In the medieval period Crusaders built a castle from reused Roman stone and established a fortified town; churches and later Mamluk and Ottoman structures added further layers. The modern port and old town remained inhabited beside the archaeological mound. Byblos is therefore a living coastal city adjacent to ruins, not an abandoned Phoenician capital preserved in isolation.

Systematic excavation began under Pierre Montet in 1921 and continued for decades under Maurice Dunand. Large-scale clearance exposed early temples, royal tombs, walls, and domestic levels, but archaeological methods and recording standards changed during the long project. Some walls were consolidated, stones reset, and visitor paths created, while excavation removed later deposits to reveal earlier phases. Objects entered museums in Lebanon and abroad. The visible arrangement reflects both ancient construction and twentieth-century decisions about which layers to expose.

UNESCO inscribed Byblos in 1984 for its exceptional chronological depth, its role in Mediterranean exchange, and its association with the spread of the Phoenician alphabet. The protected area includes archaeological remains and elements of the historic town, with different custodians and access arrangements. Original walls survive mostly at foundation or partial height, while the Crusader castle stands more substantially through later repair. Interpretation must keep Neolithic, Bronze Age, Phoenician, classical, medieval, modern urban, and excavation histories distinct while showing how one harbor landscape connected them.