From a recent business trip to Germany.

The first Heidelberg bridge was built by Karl Theodor (1742-1799), which explains its official
name "Karl-Theodor-Brücke". Altogether, the bridge was rebuilt 9 times; more than likely victim
of flooding. In 1788, it was finally rebuilt completely in stone and supported by 8 posts. The
double-armed bridge gate comes from the late middle ages. The towers served the bridge keeper not
only as an apartment, but also as a dungeon for prisoners.