The history of the city begins with the construction of the now-ruined castle by Graf Siegfried of Luxembourg in 964. It received its town charter in 1291. The city has a bellfoundry, the Glockengießerei Mabilion, which has been in operation since the 1770s, and as of 2003[update] the only one in Germany that makes bronze bells.
In 1945 to 1948 Saarburg was occupied by troops from Luxembourg. From 18 July 1946 to 6 June 1947 Onsdorf, in its then municipal boundary, formed part of the Saar Protectorate. French troops complemented the occupation until 1955.
stained glass by Werner Persy in the Protestant Church Saarburg