Historically important city with around 160,000 inhabitants in the north of the German wine-growing region of Baden in the Badische Bergstraße area. It is located on the Neckar River, where it leaves the Odenwald and enters the Upper Rhine Plain. There are many places of interest here, such as the oldest German university, which was founded in 1386. Heidelberg was a centre of art, science and also viticulture for many centuries. In the 1960s, the traditional vineyards opposite Heidelberg Castle became overgrown. The high labour input in the extreme steep slopes no longer paid off. The "balcony" of the city with many exotic plants is the Philosophenweg opposite the old town. Winegrowing was successfully reactivated there in 1998. The Heidelberg vineyards are called Burg, Dachsbuckel, Dormenacker, Heiligenberg, Herrenberg and Sonnenseite ob der Bruck.