What Was Over Nuremberg on April 14, 1561?

[Report #185] THE QUESTION: what was over Nuremberg at dawn on April 14, 1561 (Julian)? THE EVIDENCE BASE IS ONE OBJECT: a for-sale news-sheet by printer Hans Glaser (Wickiana, Zentralbibliothek Zürich) — there is no second record, no independent witness statement, no physical residue. Everything known about the display passes through a commercial print with a stated theological purpose (a call to repentance) and a market incentive for drama. FOUR READINGS HELD OPEN AT STATED WEIGHTS: (a) NATURAL-PHENOMENON (lean): the described geometry — paired blood-red arcs, globes flanking the sun, crosses, a low dawn sun — matches complex ice-crystal halo displays; contemporaneous parallels exist (Stockholm 1535 sun-dog painting; Basel 1566 sheet). (b) UNEXPLAINED-RESIDUE: the sheet's kinetic claims — an hour of to-and-fro 'fighting,' objects falling to earth 'as if they all burned' with 'immense smoke' — are not halo behavior; they are either printer's dramatization or observation, and no document arbitrates which. (c) UNRESOLVED: the single-source problem may be terminal — a 465-year-old sales flyer may simply not carry enough information to close. (d) FIRMAMENT-OPEN: if the residue is read as observation, the engine's boundary-phenomenon frame applies at public scope only. DISCIPLINE NOTES: the circulating English translation is UFO-corpus provenance (Ilse von Jacobi, Official UFO magazine, Jan 1976) — quotations carry that label; the sheet contains no biological content and does not wire to the greys lineage; both closures are prohibited equally — no imported craft, no imported tidy debunk. Lean stated, not moved; no verdict.