Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Isole Eolie (Aeolian Islands)' has mentioned 'Commerce' in the following places:
Occurrence Sentence Text Source
A manufacture and commerce of obsidian objects was highly developed until the introduction of metals.
During the Bronze Age, the Aeolians prospered by means of maritime commerce in an area which extended from Mycenae to the British Isles, from where tin was imported.