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Photo: No machine-readable author provided. Hlohning assumed (based on copyright claims)., CC BY 2.5 via Wikimedia Commons
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).
The Church of the Holy Spirit is the largest church in Heidelberg, Germany. The church, located in the marketplace in the old town center, was constructed between 1398 and 1515 in the Romanesque and Gothic styles. It receives 1–3 million guests annually, making it among the most visited churches in Germany.
© OpenStreetMap contributors
It has 1712 Baroque construction with modern touches inside.
Old Bridge, Alte Brücke
Bridge constructed in 1788.
Hauptstraße is the main street, which leads from Bismarckplatz across the old town. Approximately 1.6 km in length, it is reputedly the longest pedestrian shopping street in Germany.
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).