Hello! Do you have a source for the name "Brunnen auf dem Schlossplatz"? (You could have added it to the changeset comment.) I am from Saarbrücken and never heard that it has this name as an official name – I am not sure if it even has an official name (given by the artist/the architect Gottfried Böhm for example). It sounds more like a description than a name. 

Best regards! 