The list of things named Venetian is quite extensive.
Venetian generally describes anything from or related to the Italian city of Venice, or the Veneto region (of which Venice is the capital), or of the Republic of Venice (697–1797), a historical nation in that area.
The term Venetian may also mean from or related to the American city of Venice, Florida, in Sarasota County.
There are however many concepts where "Venetian" has a special sense that cannot be deduced form the general ones.
There are also many people, buildings, and works of art with "Venetian" in their name.