The first fact about Johannes Gutenberg is a documentary limit. There is a 1450s Mainz shop, a 42-line Bible, and a 6 November 1455 notarial instrument in a money quarrel with Johann Fust. Death is publicly 1468 after a 1465 archiepiscopal maintenance.
Public carriers, not a 1455 filing cabinet, are what a reader can actually open: https://www.britannica.com/biography/Johannes-Gutenberg (opens in a new tab), the Helmasperger article at https://www.britannica.com/topic/Helmaspergersches-Notariatsinstrument (opens in a new tab), the Gutenberg-Museum at https://www.gutenberg-museum.de/en/ (opens in a new tab), the Gesellschaft’s invention page at https://www.gutenberg-gesellschaft.de/en/johannes-gutenberg/gutenbergs-invention (opens in a new tab), Göttingen at https://www.sub.uni-goettingen.de/ (opens in a new tab), the British Library at https://www.bl.uk/ (opens in a new tab) and https://www.bl.uk/collection/explore-the-collection (opens in a new tab), the Library of Congress Bibles exhibition at https://www.loc.gov/exhibits/bibles/ (opens in a new tab), BnF at https://www.bnf.fr/en (opens in a new tab) and Gallica at https://gallica.bnf.fr/ (opens in a new tab), Cambridge Digital Library at https://cudl.lib.cam.ac.uk/view/PR-INC-00001-A-00001-00001-03761/1 (opens in a new tab), the Morgan at https://www.themorgan.org/collection/gutenberg-bible (opens in a new tab), UNESCO Memory of the World at https://www.unesco.org/en/memory-world (opens in a new tab), and Mainz at https://www.mainz.de/ (opens in a new tab).
Helmasperger is a foreclosure paper: capital took the work of the books. Fust and Schoeffer name the 1457 Psalter. Pressmen remain mostly unnamed. 1454–55 indulgences scale a spiritual rent as job-printing. 1462 sacks the print city. Later, the same industrial form multiplies Reformation pamphlet wars, seventeenth-century war news, a 1559 Index, witch-hunting manuals, colonial notices, cheap false reports, printed denunciations of named persons, paper-mill resource demand, and 1710 copy-rents. A 1900 German inventor-saint statue flattens Fust, the payroll, and non-German histories.
Offsets are also documents. The 42-line Bible is a real book. Cheaper identical copies after 1470 are a price fact with a literacy lag still visible around 1500. Scientific reprint (1543 as a type-year) and medical incunabula are later knowledge uses. Copyable official sheets are not the same as indulgences. Vernacular 1522 is Luther’s book on Gutenberg’s method. Museums and scans are doors. A 1465 coat-and-grain maintenance is a small end-of-life place, not a restoration of the shop.
Shared names: Fust, Schoeffer, Adolf of Mainz, later Luther as print reception, later libraries. What this does not say: that Gutenberg uniquely invented all printing on earth; that 1455 Europe could read; that he captained a slaver; that 1618 is his command. Confidence is high on the Bible, 6 November 1455, 1462, 1468. It is medium on later coefficients. It is null on a 1400 birthday as a ledger.
Bible is not lawsuit. Lawsuit is not sack. Sack is not Index. Index is not Vesalius. Official and independent URLs differ.
What would change the picture: a contradictory original naming a different printer of the 42-line book; a Helmasperger with a different date; a measured literacy series that can be argued, with lag and alternatives, as a consequence of 1455 rather than of later schools. Until then the dossier refuses a wizard statue and refuses a theft pamphlet that erases the book. A goldsmith is famous enough to own those files. He is not the author of 1520 or of 1710 and this page should keep that line visible without deleting the later uses of the press.