Coloured "Romweg" map, 1500. "South-up" display, as all of Etzlaub's maps.

Miniature map (93 x 65 mm) on the outside of 1511-sundial's hinged lid. Thisone and a similar one from 1513 were by error called precursors of Mercator's projection since 1917.

Erhard Etzlaub (born c.1455[?]-1465 in Erfurt; died 1532 in Nuremberg), was an astronomer, geodesist, cartographer, instrument maker and physician. ... no changes . ... Events July 13 - Battle of Montlhéry Troops of King Louis XI of France fight inconclusively against an army of the great nobles organized as the League of the Public Weal. ... Mariendom and the Severikirche. ... Events May 16 - Sir Thomas More resigns as Lord Chancellor of England. ... Nuremberg (German: Nürnberg, Polish: Norymberga) is a city in the German state of Bavaria, in the administrative region of Middle Franconia. ... This article or section should include material from Erdmessung. ... Cartography is the study of map making and cartographers are map makers. ...

Life

One "Erhart Etzlauber" became a citizen of Nuremberg in 1484, but his profession was not recorded on that occasion. Assuming that the "Eberhardus Eczleiben" who matriculated at the Erfurter Hochschule in 1568 is very probably the same person, then the year of his birth should be between 1455-1460 rather than later. Events January 25 - Peter Arbues, chief of the Spanish Inquisition, is assassinated when he is praying in the cathedral at Saragossa, Spain July 6 - Portuguese sea captain Diogo Cão finds the mouth of Congo River December 5 - Pope Innocent VIII gives the inquisition a mission to hunt heretics and...

From letters from a third party dated 1500 and 1507, we learn that he was a well-known instrument ("compass") maker and a geodesist, and from a letter dated 1517, that "he had also practicised as a physician for at least four years" and that he "comes from Erfurt". In 1515, he declared himself to be an "astronomer and physician, from Erfurt University". This article or section should include material from Erdmessung. ...

His death is noted in as the 15th entry in an official list of 20 people buried between December 20, 1531 and February 21, 1532. Therefore, he very probably died in January or early February 1532. There were no inheritors.

The cartographer

The "Romweg" Map

On occasion of the Holy Year 1500, when many pilgrims were expected to go to Rome, he designed his famous "Rom-Weg" map, a 41 x 29 cm wood engraving in stereographic projection of app. scale 1:5,6 mio., the earliest printed road map of central Europe. It is, as all of Etzlaub's maps, "South-up". Distances between cities can be computed by dotted lines, where a one-dot-step means one German Mile (7400m). If the prints were coloured (according to author's innovative requirements), they show political regions, too. 1500 was a common year starting on Monday (see link for calendar) of the Gregorian calendar. ... Thomas Bewick. ... Stereographic projection of a circle of radius R onto the x axis. ...

The area of the map is between latitudes 58° (Viborg, Denmark) and 41° (Naples). No longitudes are given, but Paris shows up at the Western margin, Budapest at the Eastern one. Data may have been drawn from c.1421 Klosterneuburg Fridericus map as well as from Etzlaub's own interviews with travelling merchants. Viborg, is a town located in central Jutland, Denmark. ... Naples (Italian: , Neapolitan: Nàpule, from Greek Νεάπολη < Νέα Πόλις Néa Pólis New City) Capital of the Campania region and the Province of Naples. ... City flag City coat of arms Motto: Fluctuat nec mergitur (Latin: Tossed by the waves, she does not sink) Paris Eiffel tower as seen from the esplanade du Trocadéro. ... This article or section does not adequately cite its references or sources. ... Klosterneuburg is a city in Lower Austria with a population of 24,442. ...

The "Roman Empire" road map

This was a second and improved edition of principally the same map, 1501, 54,5 x 39,7 cm, printed in Nuremberg by Georg Glogkendon. In 1533, Glogkendon's son Albrecht printed one more (unchanged) edition. The area covered by that later map was expanded to latitude 40° (south of Salerno), and about 74 more km towards West, and the map was more detailed in former marginal regions. 1501 was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar. ...

From all three editions, only 6 samples are known to have survived (e.g. the ones held by SUB (Göttingen), Germanisches Nationalmuseum (Nuremberg), Bibliothèque Nationale (Paris), British Library (London)), but Etzlaub's data were widely used during the first half of the 16th century, among others by Martin Waldseemüller and Sebastian Munster. Often, even the "South-up" display was copied. Martin Waldseemüller (ca. ... Portrait of Sebastian Münster by Christoph Amberger, c. ...

More maps

Besides the innovative "Romweg" map and its later editions, only two still existing maps are definitely known to be designed by Etzlaub:

1. A 1492 wood cut (39 x 27 cm, printed by Jorg [George] Glogkendon, Nuremberg), showing 100 localities and their names within a radius of 120 km from Nuremberg.
2. Another map of Nuremberg's territory, 1519, painted on parchment by Nuremberg painter Michel Graf (scale ca. 1:30.000, 94 x 84 cm).

• An earlier similar map, from 1516, came to us only as a copy made in 1600.
• A 1507 plan of Hauseck real estates bought by the Nuremberg magistrate is lost.
• With some probability (being very similar to the 1519 map), a map from 1516, parchment, 60 x 69 cm is Etzlaub's design.
• The earliest map of Bohemia, created by Mikuláš Klaudyán (Nikolaus Klaudian or Claudianus) and printed in Nuremberg in 1518, is likely to be somehow "connected" to Etzlaub: Klaudyán stayed at Nuremberg serveral times during the years before, and one of Etzlaub's Almanachs appeared in Czech language in 1517 although Etzlaub is very unlikely to have spoken it. The Klaudyán map is "South-up", shows an outline of Bohemia's borders similar to the "Romweg" map, and is coloured in a similar way.

Flag of Bohemia Bohemia (Czech: ; German: ) is a historical region in central Europe, occupying the western and middle thirds of the Czech Republic. ...

The instrument maker

Etzlaub's 1513 sundial, 84 x 116 mm.

"Kompast" [sic!] was the term used for pocket-size sundials produced in Nuremberg since Regiomontanus' days, which were fitted with a compass, too, and were also used by seafarers. Only two of Etzlaub's pieces remain: one, from 1511, is kept by Germanisches Nationalmuseum (Nuremberg), another one, from 1513 and in Drecker's collection, purportedly "went to the USA". Wall sundial Wall sundial in Warsaws Old Town A sundial measures time by the position of the sun. ... Johannes Müller von Königsberg (June 6, 1436 – July 6, 1476), known by his Latin pseudonym Regiomontanus, was an important German mathematician, astronomer and astrologer. ...

In his time, Etzlaub's pieces were demanded: In a 1507 letter, Michel Beheim, brother of famous globe maker Martin Behaim, tells his brother Wolfgang that such pieces (i.e. more than one) will be sent to him to Lisbon within a few weeks, as soon as Etzlaub would have finished them. Johannes Cochlaeus notes on Etzlaub's work in Brevis Germaniae Descriptio, 1512, that his sundials were even demanded in Rome. Martin Behaim (October 6, 1459 – July 29, 1507), or Behem, was a navigator and geographer of great pretensions. ...

Miniature maps (latitudes 67°–0°, "South-up", no longitudes given) are engraved on the outside of the instrument's lids, allowing its user to adjust the gnomone according to actual latitude. To cope with compass bearings between the cities given, varying latitudes were used, reducing scale for lower latitudes, which was innovative, but conceptually opposite to Mercator's later approach (F.W. Krücken, 2004). In 1917, Joseph Drecker (1853-1931) had examinated the 1513 miniature map and declared it to be a Mercator projection. After carefully analyzing both Etzlaub's und Mercator's maps, Krücken finds out: "There is no reason to see Etzlaub as a precursor of Mercator's projection". Mercator world map Nova et Aucta Orbis Terrae Descriptio ad Usum Navigatium Emendate (1569) The Mercator projection is a cylindrical map projection presented by the Flemish geographer and cartographer Gerardus Mercator, in 1569. ...

Instructions on the use of his sundials were given by Etzlaub in Codex ad Compastum Norembergensem which was kept by Staatsbibliothek, Munich, Germany, but seems lost.

Etzlaub's "almanachs"

Etzlaub's coat of arms

Those were calenders to be hanged on the wall, giving festive days, new and full moon, some planet's positions and hints on healthcare like best tiems for blood-letting. They show up since 1515. It is likely that Etzlaub published them every year, although the preserved samples are not continuous. According to different regions where they would be sold, the same content was presented in a varying design. From 1520, four different versions exist, designed for "Hochstift Eichstädt", "City of Regensburg", "Pfalzbayern" and Austria. Regensburg (also Ratisbon, Latin Ratisbona) is a city (population 129,175 in 2005) in Bavaria, Germany, located at the confluence of the Danube and Regen rivers, at the northernmost bend in the Danube. ...

Since 1517, Etzlaub's coat of arms shows up in many but not all of his almanacs. It seems, however, to be unknown to relevant German collections of heraldry.

Literature

• Brigitte English, Erhard Etzlaub's Projection and Methods of Mapping, in: Imago Mundi, 48 (1996), pp.103-123.

Weblinks

• Works by and about Erhard Etzlaub in the German National Library catalogue
• Fritz Schnelbögl, „Leben und Werk des Nürnberger Kartographen Erhard Etzlaub“ in Mitteilungen des Vereins für Geschichte der Stadt Nürnberg Bd. 57. 1970, S. 216-231, Facsimile, German.
• F.W. Krücken, Düsseldorf 2004, On Etzlaub's and Mercator's maps, German
• Facsimile of the 1500 "Romweg" map, not coloured, but high resolution
• Cut of the 1500 "Romweg" map, coloured
• Cut of the 1501 coloured edition
• 1492, Surroundings of Nuremberg, zoomable map (Österreichische Nationalbibliothek, Vienna, Austria)