On 14 April 1561, a printed broadsheet attributed to Hans Glaser records a dawn spectacle over Nuremberg with blood-red arcs, circles, crosses, and spears before a broad audience. Its inscription places the phenomenon between four and five in the morning and says it lasted until the objects burned down toward the earth in smoke. 1 2
Origin of the report
The item appears in Zentralbibliothek Zürich’s printed-image record as a single-sheet woodcut and text notice from Nuremberg, measuring 26.2 by 38 centimeters, preserved as part of the Pas II 12/60 holding. Its bibliographic data and DOI citation establish that the source is contemporary to the period and survives as a digitized primary artifact rather than a later retelling. 3 1 4
Who witnessed it
The text names no single famous individual witness but claims broad visibility by "many men and women" in the city, at the gates, and beyond Nuremberg’s limits. This crowdsourced structure of testimony is a defining feature of the source and frames the later interpretation gap that follows. 2 5
Interpretation trajectory
Nineteenth- and twentieth-century readers often treated the print as an historical UFO narrative, while historians and meteorological readers have repeatedly framed it as a culturally inflected sky sign, including halo-type phenomena, with theological warning language in the original wording. The same preserved broadsheet therefore supports competing interpretations: devotional polemic, natural optical explanation, and retrofitted anomaly reporting. 6 7