Ladenburg is a town in the district of Rhein-Neckar-Kreis, in Baden-Württemberg, Germany. It is situated on the right bank of the Neckar, 10 kilometres (6 miles) east of Mannheim, and 10 km (6 mi) northwest of Heidelberg. Ladenburg's history dates back to Celtic and Roman ages. In Roman times it was called 'Lopodunum'. Emperor Trajan elevated it to the status of a city ('civitas') in the year 98. Its old centre dates back to the Late Middle Age. Ladenburg is located on Bertha Benz Memorial Route.