After the Habsburg emperor Charles V had re-acquired the Duchy of Guelders from Duke William of Jülich-Cleves-Berg by the 1543 Treaty of Venlo, the Seventeen Provinces comprised:
the County of Artois
the County of Flanders, including the burgraviates of Lille, Douai, Orchies, the Lordship of Tournai and the Tournaisis
the Lordship of Mechelen
the County of Namur
the County of Hainaut
the County of Zeeland
the County of Holland
the Duchy of Brabant, including the Lordship of Breda, the Margraviate of Antwerp, the counties of Leuven and of Brussels, and the advocacy of the Abbey of Nivelles and of Gembloux
the Duchy of Limburg and the "Overmaas" lands of Brabant (Dalhem, Valkenburg and Herzogenrath)
the Duchy of Luxembourg
the Prince-Bishopric, later Lordship of Utrecht
the Lordship of Frisia
the Duchy of Guelders
the Lordship of Groningen (including the Ommelanden)
the Lordship of Drenthe, Lingen, Wedde, and Westerwolde
the Lordship of Overijssel
the County of Zutphen
It was not always the same seventeen provinces represented at the Estates-General of the Netherlands.
Sometimes one delegation was included in another.

In later years the County of Zutphen became a part of the Duchy of Guelders, and the Duchy of Limburg was dependent on the Duchy of Brabant.
The Lordship of Drenthe is sometimes considered as part of the Lordship of Overijssel.
 On the other hand, the French-speaking cities of Flanders were sometimes recognised as a separate province.


Therefore, in some lists Zutphen and Drenthe are replaced by 
burgraviates of Lille, Douai, Orchies (also called Walloon Flanders)
Tournai and the Tournaisis
There were a number of fiefdoms in the Low Countries that were not part of the Seventeen Provinces, mainly because they did not belong to the Burgundian Circle but to the Lower Rhenish-Westphalian Circle.
The largest of these was the Prince-Bishopric of Liège, the green area on the map, including the County of Horne.
The ethnically and culturally Netherlandish duchies of Cleves and Julich did not join either.
In the north, there were also a few smaller entities like the island of Ameland that would retain their own lords until the French Revolution.

Historians came up with different variations of the list, but always with 17 members.
This number could have been chosen because of its Christian connotation.
After the Habsburg emperor Charles V had re-acquired the Duchy of Guelders from Duke William of Jülich-Cleves-Berg by the 1543 Treaty of Venlo, the Seventeen Provinces comprised:
the County of Artois
the County of Flanders, including the burgraviates of Lille, Douai, Orchies, the Lordship of Tournai and the Tournaisis
the Lordship of Mechelen
the County of Namur
the County of Hainaut
the County of Zeeland
the County of Holland
the Duchy of Brabant, including the Lordship of Breda, the Margraviate of Antwerp, the counties of Leuven and of Brussels, and the advocacy of the Abbey of Nivelles and of Gembloux
the Duchy of Limburg and the "Overmaas" lands of Brabant (Dalhem, Valkenburg and Herzogenrath)
the Duchy of Luxembourg
the Prince-Bishopric, later Lordship of Utrecht
the Lordship of Frisia
the Duchy of Guelders
the Lordship of Groningen (including the Ommelanden)
the Lordship of Drenthe, Lingen, Wedde, and Westerwolde
the Lordship of Overijssel
the County of Zutphen
It was not always the same seventeen provinces represented at the Estates-General of the Netherlands. Sometimes one delegation was included in another.
In later years the County of Zutphen became a part of the Duchy of Guelders, and the Duchy of Limburg was dependent on the Duchy of Brabant. The Lordship of Drenthe is sometimes considered as part of the Lordship of Overijssel.  On the other hand, the French-speaking cities of Flanders were sometimes recognised as a separate province.

Therefore, in some lists Zutphen and Drenthe are replaced by 
burgraviates of Lille, Douai, Orchies (also called Walloon Flanders)
Tournai and the Tournaisis
There were a number of fiefdoms in the Low Countries that were not part of the Seventeen Provinces, mainly because they did not belong to the Burgundian Circle but to the Lower Rhenish-Westphalian Circle. The largest of these was the Prince-Bishopric of Liège, the green area on the map, including the County of Horne. The ethnically and culturally Netherlandish duchies of Cleves and Julich did not join either. In the north, there were also a few smaller entities like the island of Ameland that would retain their own lords until the French Revolution.
Historians came up with different variations of the list, but always with 17 members. This number could have been chosen because of its Christian connotation.
Seventeen Provinces