Altstadt in Heidelberg, Baden-Württemberg, Germany — Central Europe
Spektralanalyse
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Spectroscopic Analysis
Photographed by James Hulse, February 19, 2026
1. Spektralanalyse / Spectroscopic Analysis Marker
In diesem Hause hat Kirchhoff 1859 seine mit Bunsen begründete Spektralanalyse auf Sonne und Gestirne gewandt und damit die Chemie des Weltalls erschlossen.
In this house, in 1859, Kirchhoff applied the Spectroscopic Analysis he had founded with Bunsen to the sun and the stars, thereby unlocking the chemistry of the universe.
Topics. This historical marker is listed in this topic list: Science & Medicine. A significant historical year for this entry is 1859.
Location. 49° 24.627′ N, 8° 41.876′ E. Marker is in Heidelberg, Baden-Württemberg. It is in Altstadt. It is at the intersection of Hauptstraße and Akademiestraße, on the right when traveling east on Hauptstraße. Touch for map. Marker is at or near this postal address: Hauptstraße 50, 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. At least 8 other markers are within walking distance of this marker: Wilhelm Salomon-Calvi (a few steps from this marker); Robert Wilhelm Bunsen (within shouting distance of this marker); Friedrichsbau / Friedrich Building (within shouting distance of this marker); Historische Stätten der Chemie / Historic Landmarks of Chemistry
this page online
Also see . . . Gustav Kirchhoff. Wikipedia
Gustav Robert Kirchhoff (12 March 1824 – 17 October 1887) was a German physicist and mathematician who contributed to the fundamental understanding of electrical circuits, spectroscopy, and the emission of black-body radiation by heated objects. He coined the term black body in 1860.(Submitted on February 27, 2026, by James Hulse of Medina, Texas.)
Several different sets of concepts are named "Kirchhoff's laws" after him, which include Kirchhoff's circuit laws, Kirchhoff's law of thermal radiation, Kirchhoff's diffraction formula, and Kirchhoff's law of thermochemistry.
The Bunsen–Kirchhoff Award for spectroscopy is named after Kirchhoff and his colleague, Robert Bunsen.
Photographed by James Hulse, February 19, 2026
2. Spektralanalyse / Spectroscopic Analysis Marker
The marker at the side of the building.
Photographed by James Hulse, February 19, 2026
3. Spektralanalyse / Spectroscopic Analysis Marker
The view of the marker along the right side of the building.
Credits. This page was last revised on February 27, 2026. It was originally submitted on February 26, 2026, by James Hulse of Medina, Texas. This page has been viewed 24 times since then. Photos: 1, 2, 3. submitted on February 27, 2026, by James Hulse of Medina, Texas.
