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Photo: RAdoslav Droschdschewski (Zwiadowca21), CC BY-SA 3.0 via Wikimedia Commons
Large theatre house, home also to the philharmonic orchestra. Concerts, music theatre, dance and other performances.
Theater & Orchester Heidelberg is a theatre in Heidelberg, Baden-Württemberg. The Heidelberger Stückemarkt, an annual theatre festival and competition for emerging playwrights, is held at the theatre.
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Palatinate Museum
This city-run museum contains interesting exhibits of items from Heidelberg's pre-history to modern times, and a fine-art collection. Audio guide available, including in English
The university has its own museum, in the main building of the old campus. Visitors are able to view the Great Hall (when not in use), and the former "student jail".
The old university in the old city.
The old armoury is now a student cafeteria (open to the public and offering good food and drinks at reasonable prices).
It has 1712 Baroque construction with modern touches inside.
The Heiliggeistkirche (Church of the Holy Spirit) is only one of many large and small churches, but definitely the one with the most interesting history. During the Dark Ages, it was the shelter of the Bibliotheca Palatina, Germany's oldest library. The Bibliotheca was stolen and brought to Rome but eventually returned in pieces. Today, parts of it can be visited in the University Library (also the oldest and probably the most valuable of its kind in Germany), which is situated close to the old university. You can get a great view of the Heiliggeistkirche, Old Town, and the Neckar river bridge from the castle (Schloss Heidelberg).