President Friedrich Ebert Memorial

Meder House (German: Haus Meder) is a protected baroque building on the Hauptstrasse in Heidelberg's old town, the Altstadt. It is a residential building that was built in the first half of the 18th century and was in the possession of the Meder family, who worked as merchants, from 1839 at the latest. The three-story house with an attic apartment is located in the eastern half of the Hauptstrasse, the main street of the Heidelberg Altstadt, on the corner with Kettengasse ("chain alley"). The showy facade on the Hauptstrasse has three windows on each floor, while the facade on Kettengasse is longer, with eight windows, but also simpler. At the corner, on the first floor is a Madonna, which was probably made by the sculptor Peter van den Branden, who also made the Kornmarkt-Madonna. The statue on the building today is a copy; the original is kept in the Kurpfälzisches Museum. The central relief on the facade, depicting the Trinity, is remarkable for their period. It is flanked by two inscriptions: "Alle Stund und Zeit sei gelobt die heilige Dreifaltigkeit" (Every hour and moment, let the Holy Trinity be praised!) and "Wer Gott verdraut hatt wohl Gebaut" (He who trusts God, has built well). The decoration of the building thus showcases the Catholic piety of its owners, during the Counterreformation in Heidelberg.

The Church of the Holy Spirit (German: Heiliggeistkirche) 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.The church was planned as the burial place of the Electors of the Palatinate and as a representative church of the Palatinate royal seat. In the Palatine War of Succession, the princely graves of the Electors were destroyed; today only the grave of the founder of the church, Elector Ruprecht III, remains. The church was also the location of the founding of the Heidelberg University and was the original repository of the Bibliotheca Palatina. The congregation was originally Roman Catholic, but the church has changed denominations more than ten times through its history. Intermittently, over a 300 year period, the nave and the choir of the church were separated by a wall, allowing both Catholics and Protestants to practice in the church at the same time. The wall was ultimately removed in 1936, and the congregation is now solely Protestant. Today, it is a parish church within the Evangelical Church of Heidelberg and is part of the Evangelical Church in Germany.

The Karl Theodor Bridge (German: Karl-Theodor-Brücke), commonly known as the Old Bridge (Alte Brücke), is an arch bridge in Heidelberg that crosses the Neckar river. It connects the Old City with the eastern part of the Neuenheim district of the city on the opposite bank. The current bridge, made of Neckar sandstone and the ninth built on the site, was constructed in 1788 by Elector Charles Theodore, and is one of the best-known landmarks and tourist destinations in Heidelberg.

The Marktplatz (German: Marketplace) is a central square in Heidelberg's old town, the Altstadt. It has served as a marketplace since the establishment of the city in Medieval times. The Hauptstrasse runs along one side and the Church of the Holy Spirit and the Town Hall are located on the square.

The Universitätsplatz ("University square"), previously known as Paradeplatz, Ludwigsplatz, and Langemarckplatz (1937-1945) is an open square in Heidelberg's old town, the Altstadt. The Hauptstrasse runs along the north side, the west side is marked by Grabengasse, which follows the line of the original city walls. The east and south sides are bordered by buildings of the University, which gives the square its name.

The Old University (German: Alte Universität) is an important baroque building of the University of Heidelberg located between the Hauptstrasse and the Universitätsplatz in the old town of Heidelberg. It contains the Hall of the University, once the main assembly hall and lecture theatre of the University, as well as the Heidelberg University Museum and the old University gaol.

The Hauptstrasse (German: Hauptstraße, "Main Street") is the central street of Heidelberg's old town, the Altstadt, running the full length of the quarter. Today, it is a pedestrianised zone and popular shopping street. Numerous landmarks are located along its course, including the Town Hall, the Church of the Holy Spirit, and the Church of Providence.

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 Germany's oldest university and one of the world's oldest surviving universities. It was the third university established in the Holy Roman Empire.Heidelberg has been a coeducational institution since 1899. The university consists of twelve faculties and offers degree programmes at undergraduate, graduate and postdoctoral levels in some 100 disciplines. Heidelberg comprises three major campuses: the humanities are predominantly located in Heidelberg's Old Town, the natural sciences and medicine in the Neuenheimer Feld quarter, and the social sciences within the inner-city suburb Bergheim. 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, psychiatric genetics, environmental physics, and modern sociology were introduced as scientific disciplines by Heidelberg 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.Heidelberg 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's noted alumni include eleven domestic and foreign heads of state or heads of government. In international comparison Heidelberg University occupies top positions in rankings and enjoys a high academic reputation.

The Kornmarkt ("Corn market") is a square in the Altstadt of Heidelberg, near the Marktplatz. The north edge of the Kornmarkt is marked by the Hauptstrasse, the south by Ingrimstrasse and Karlstrasse. The Burgweg, which leads up to Heidelberg Castle, begins to the south of the Kornmarkt.

The Kornmarkt-Madonna ("Cornmarket Madonna") is a fountain sculpture in the Kornmarkt in the Altstadt of Heidelberg. It is also known as the Mariensäule (Mary column) and Muttergottesbrunnen (Mother of God fountain).

The Klingenteichbach (German for "tinkling pond stream") also called the Klingenbach or Klingengraben, is a 1.5 km long stream in Heidelberg, Baden-Württemberg, which once formed the western boundary of the town, but is now mostly covered over. It is a left tributary of the Neckar.

The Heidelberg University Library (German: Universitätsbibliothek Heidelberg, ISIL DE-16) is the central library of the Heidelberg University. Together with the 83 decentralized libraries of the faculties and institutes, it forms the University Library System, which is headed by the director of the University Library. The University Library holds special collections in literature concerning the Palatinate and Baden, egyptology, archeology, the history of art, and South Asia. It holds about 3.2 million books, 6,000 printed scientific periodicals, and about 500,000 other media such as microfilms and video tapes. The libraries of the faculties and institutes hold another 3 million printed books. In 2022, the University Library registered 43,600 active users who accessed more than 746,000 books. The conventional book supply is complemented by numerous electronic services, including approximately 152,00 electronic journals. The University Library provides around 1,100 reading- and workspaces in the main library in the old town and around 320 reading- and workspaces in the branch in the Neuenheimer Feld, including many IT-workstations and research stations equipped with PCs.