The “Lion bridge” - Spanning across 49 metres over the Danube Canal and towpath, the bridge links Nussdorf in Vienna’s 19th district with the Brigittenauer Sporn in the 20th district. It owes its name to the architect and hydraulic engineer Jospeh Maria Schemerl von Leythenbach, who, in his capacity as Hofbauratsdirektor (court architect), drew up a first plan for regulating the Danube in 1810, although this was never implemented.