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Thieu
 (Walloon)
Coordinates: 50°28′29″N 4°05′45″E / 50.47472°N 4.09583°E / 50.47472; 4.09583
Country Belgium
Region Wallonia
Province Hainaut
Municipality Le Rœulx
 Source: NIS
Postal code
7070
Area code064

Thieu (Walloon: ) is a village of Wallonia and a district of the municipality of Le Rœulx, located in the province of Hainaut, Belgium.

The St. Gaugericus' church