The Wiener Neustadt Canal was Austria's only shipping canal, originally meant to reach to Trieste. It became operational in 1803 and ceased to be used for transportation before World War I.
References
Fritz Lange: Von Wien zur Adria – Der Wiener Neustädter Kanal, 2003, ISBN 3-89702-621-X
Valerie Else Riebe: Der Wiener Neustädter Schiffahrtskanal, 1936