In 1970, the development work of the current Port Vauban of Antibes revealed during submarine soundings the foundations of antique walls from the Roman period and the remains of 229 ft (70 m) long quays facing Saint-Michel source. The discovery of this stepped support built in flat stones and paved on its surface provided the archaeological proof of the existence of an antique port installation. The blocks of refractory stones from the Terme Blanc quarries in Biot found in the sea testify to the significant exportation set up throughout the Mediterranean basin since Roman Antiquity.