Heidelberg (German: [ˈhaɪdl̩bɛʁk] ^ⓘ; Palatine German: Heidlberg) is a city in the German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914, of which roughly a quarter consisted of students.^[3]

Located about 78 km (48 mi) south of Frankfurt, Heidelberg is the fifth-largest city in Baden-Württemberg. Heidelberg is part of the densely populated Rhine-Neckar Metropolitan Region.

Heidelberg University, founded in 1386, is Germanys oldest and one of Europes most reputable universities.^] Heidelberg is a scientific hub in Germany and home to several internationally renowned research facilities adjacent to its university, including the European Molecular Biology Laboratory and four Max Planck Institutes.^[] The city has also been a hub for the arts, especially literature, throughout the centuries, and it was designated a "City of Literature" by the UNESCO Creative Cities Network.

Heidelberg was a seat of government of the former Electorate of the Palatinate and is a popular tourist destination due to its romantic cityscape, including Heidelberg Castle, the Philosophers Walk, and the Baroque old town.

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Heidelberg University, officially the Ruprecht Karl University of Heidelberg (German: Ruprecht-Karls-Universität Heidelberg; Latin: Universitas Ruperto Carola Heidelbergensis), is a public research university in Heidelberg, Baden-Württemberg, Germany. Founded in 1386 on instruction of Pope Urban VI, Heidelberg is Germanys oldest university and one of the worlds oldest surviving universities; it was the third university established in the Holy Roman Empire after Prague (1347) and Vienna (1365). Since 1899, it has been a coeducational institution.

Heidelberg is one of the most prestigious universities in Germany.^[] It is a German Excellence University, part of the U15, as well as a founding member of the League of European Research Universities and the Coimbra Group. The university consists of twelve faculties and offers degree programmes at undergraduate, graduate and postdoctoral levels in some 100 disciplines.^[] The language of instruction is usually German, while a considerable number of graduate degrees are offered in English as well as some in French.^[]

As of 2021, 57 Nobel Prize winners have been affiliated with the city of Heidelberg and 33 with the university itself.^[] Modern scientific psychiatry, psychopharmacology, experimental psychology, psychiatric genetics, mathematical statistics,^[] environmental physics,^[] and modern sociology^[] were introduced as scientific disciplines by Heidelberg students or faculty. Approximately 1,000 doctorates are completed every year, with more than one third of the doctoral students coming from abroad.^[ International students from some 130 countries account for more than 20 percent of the entire student body..

.2024.暑假期間,海德堡大學城內寧靜許多,學生絕大部份返回家庭或是到外地旅遊及打工,直到9月中旬學校開學,海德堡大學城又恢復過來熙來攘往的熱鬧與忙碌,有些2手家庭生活用品及書籍便宜出售,是淘寶者的最愛,雖然疫情結束海德堡校園內部開放,但是扔要事前申請入校許可證,因為有人數總量管制,校門口門禁設有紅外線遠端掃瞄監視器,可以測量出人體的溫度及臉型,瞳孔識別已鑑識是否有問題人員或是恐怖份子,混入校園搞破壞,總而言之距離開學日期愈來愈近讀者們要把握時間暢遊海德堡大學城.