Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Archaeological Area and the Patriarchal Basilica of Aquileia' has mentioned 'Trade' in the following places:
Occurrence Sentence Text Source
However, since the 13th century BC, the site, on the river and at the head of the Adriatic, had also been of commercial importance as the end of the Baltic amber (sucinum) trade.