car:
Coming on the Autobahn A 620 Saarbrücken-Merzig, take the Saarlouis exit and follow the Metzer Straße, direction city/downtown. At the roundabout, take the second to the last exit (Kaiser Wilhelm Straße). Keep going straight. Past the intersection, turn onto the second street on the left (Handwerkerstraße).
train:
Coming by train, get off at Saarlouis Hauptbahnhof station and continue by bus to the city centre