View larger size  Stadthalle Convention Center The Stadthalle, erected next to the Neckar River in 1901-03, is one of the most important public buildings in the Old Town area dating back to the turn of the century (together with the University Library and the Kurfürst Friedrich Secondary School). The city of Heidelberg had it built in honor of the 100th anniversary of the university reform of 1803, based on plans by the architects Henkenhaf and Ebert. This imposing building, provided for the city’s residents to hold meetings and festivities, embodies an age of economic and cultural blossoming, affluence, rapid population growth, expansion of the university, and growth of tourism. The main attraction of the building, which is able to accommodate up to 3,500 persons, is a large hall for concerts and celebrations. It features concert organs built by Voit, which constitute an outstanding testimonial to the organ building art of the early 20th century. Sporting a Renaissance-inspired architectural style that also incorporate Art Nouveau elements, the Stadthalle Convention Center is very popular as a venue for international meetings and events..