Strabo Geography 16.2.23

[23] Tyre is wholly an island, built nearly in the same manner as Aradus. It is joined to the continent by a mound, which Alexander raised, when he was besieging it. It has two harbours, one close, the other open, which is called the Egyptian harbour. The houses here, it is said, consist of many stories, of more even than at Rome; on the occurrence, therefore, of an earthquake, the city was nearly demolished. ¹ It sustained great injury when it was taken by siege by Alexander, but it rose above these misfortunes, and recovered itself both by the skill of the people in the art of navigation, in which the Phoenicians in general have always excelled all nations, and by (the export of) purple-dyed manufactures, the Tyrian purple being in the highest estimation. The shellfish from which it is procured is caught near the coast, and the Tyrians have in great abundance other requisites for dyeing. The great number of dyeing works renders the city unpleasant as a place of residence, but the superior skill of the people in the practice of this art is the source of its wealth. Their independence was secured to them at a small expense to themselves, not only by the kings of Syria, but also by the Romans, who confirmed what the former had conceded. ² They pay extravagant honours to Hercules. The great number and magnitude of their colonies and cities are proofs of their maritime skill and power.

Such then are the Tyrians.