Altstadt in Heidelberg, Baden-Württemberg, Germany — Central Europe
Kongresshaus
⎯⎯⎯
Congress Hall
Photographed by James Hulse, February 19, 2026
1. Kongresshaus / Congress Hall Marker
Hier im Kongresshaus fand im September 1925 der Parteitag der Sozialdemokratischen Partei Deutschlands SPD statt. Er verabschiedete das „Heidelberger Programm", dessen wichtigste Forderung die „Bildung der Vereinigten Staaten von Europa" war.
Here in the Congress Hall, the party convention of the Social Democratic Party of Germany (SPD) took place in September 1925. It adopted the “Heidelberg Program,” whose central demand was the “creation of the United States of Europe.”
Erected 2018 by Stadt Heidelberg and Social Democratic Party of Germany (SPD) – Heidelberg. (Marker Number 705.)
Topics. This historical marker is listed in this topic list: Government & Politics. A significant historical month for this entry is September 1925.
Location. 49° 24.727′ N, 8° 41.987′ E. Marker is in Heidelberg, Baden-Württemberg. It is in Altstadt. It is at the intersection of Untere Neckarstraße and Karpfengasse, on the left when traveling east on Untere Neckarstraße. Touch for map. Marker is at or near this postal address: Untere Neckarstraße 44, Heidelberg BW 69117, Germany. Touch for directions.
Regionally, it is in Europe, the European Union, Atlantic Europe, Central Europe, the Schengen Area, Western Europe, and the Western World. Historically, it finds itself in what was once the Roman Empire and specifically also the Holy Roman Empire.
Other nearby markers.
this page online
Also see . . . Social Democratic Party of Germany. Wikipedia
The Social Democratic Party of Germany (Sozialdemokratische Partei Deutschlands, SPD) is a social democratic political party in Germany. It is one of the major parties of contemporary Germany. Lars Klingbeil has been the party's leader since the 2021 SPD federal Party convention together with Bärbel Bas, who joined him in June 2025. After losing the 2025 federal election, the party is part of the Merz government as the junior coalition partner. The SPD is a member of 12 of the 16 German state governments and is a leading partner in seven of them.(Submitted on February 28, 2026, by James Hulse of Medina, Texas.)
Photographed by James Hulse, February 19, 2026
2. Kongresshaus / Congress Hall Marker
The marker is located on the southwest corner of the Stadthalle building.
Photographed by James Hulse, February 19, 2026
3. Kongresshaus / Congress Hall Marker
The western view of the Stadthalle building. The marker is located at the right side corner of the building behind a vehicle.
Credits. This page was last revised on February 28, 2026. It was originally submitted on February 26, 2026, by James Hulse of Medina, Texas. This page has been viewed 32 times since then. Photos: 1, 2, 3. submitted on February 28, 2026, by James Hulse of Medina, Texas.
