of the ephemeris of Regiomontanus. It had a large circulation, underwent 13 editions until 1551 and exerted a strong effect on Renaissance astronomy. 1512 - 1514: Commentary on Ptolemy's Geography. Unpublished manuscript with comments on books 1 and 2 of the Geography, preserved at University of Tübingen; the remaining commentaries were lost in a fire in 1534. 1513: A book on the construction and use of the astrolabe (Elucidatio fabricae ususque astrolabii), published in 16 editions up until 1620, and, in 2007, for the first time in English. 1514: Astronomical tables (Tabulae astronomicae). 1518: A proposal for a calendar revision (Calendarium romanum magnum) which formed a foundation for the Gregorian calendar. 1532 1534 (posthumously published): Commentary on the Sphaera of pseudo-Proclus (Ioannis Stoefleri Iustingensis mathematici eruditissimi, faciléque omnium principis, in Procli Diadochi, authoris grauissimi Sphæram mundi, omnibus numeris longè absolutissimus commentarius) 1534 Legacy The lunar crater "Stöfler" (with one f) was named in his honour. References External links Electronic facsimile-editions of the rare book collection at the Vienna Institute of Astronomy Online Galleries, History of Science Collections, University of Oklahoma Libraries – High resolution images of works by and/or portraits of Johannes Stoeffler in .jpg and .tiff format 1452 births 1531 deaths People from Alb-Donau-Kreis German astrologers 15th-century German astronomers 15th-century apocalypticists 15th-century astrologers 16th-century apocalypticists 16th-century astrologers 15th-century German mathematicians Flood myths 16th-century German mathematicians Academic staff of the University of Tübingen 16th-century deaths from plague (disease) 16th-century German astronomers