This belfry rises up from the city centre along the axis of the canal that leads to the sea. Its architecture is simple, even austere: it is basically a square tower. Its only frill is the lantern clad in slate that adorns the summit. The first time a belfry was built in Gravelines was in 1608, but it struggled to withstand the ravages of time and needed to be restored time and again. At the beginning of the 20th century, a few decorations and a weathervane were added to the original building.