Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Centre of the City of Salzburg' has mentioned 'Salt' in the following places:
Occurrence Sentence Text Source
Salzburg (Austrian German: [xcbx88saltsbxcax8axc9x90k]; German: [xcbx88zaltsbxcax8axc9x90k] (listen);[note 1] literally "Salt Fortress"; Bavarian: Soizbuag) is the capital city of the State of Salzburg and fourth-largest city in Austria.
Its main sources of income were salt extraction and trade and, at times, gold mining.
The name Salzburg means "Salt Castle" (Latin: Salis Burgium[citation needed]).
The name derives from the barges carrying salt on the River Salzach, which were subject to a toll in the 8th century as was customary for many communities and cities on European rivers.