This is a charming, copper-engraved [?] 19th century map of the Austrian Tyrol and surrounding provinces. This is a topographical map and also features nation-state boundaries. Undated but presumed mid-19th century: no earlier than 1816 and no later than 1883. The map contains neither a legend nor other attributions as to the publisher or date of publication. Likely published and printed in Austria, or perhaps Germany, given that the names of provinces and major cities are rendered in German, as in Mailand for Milano, Venedig for Venezia, etc. This is a medium-sized fold-out map of 8 sections. Each section is approximately 8.5 x 5.75 inches and is backed onto linen [or linen-like] material. When unfolded the approximate dimensions of the map are 17.25 inches high by 23.5 inches wide. Latitudes and longitudes are indicated along the margins. Various provinces are outlined with hand-colored borders. The Tyrol is in blue, Salzburg and Venedig are in red, Lombardey and the Kingdom of Illyria are in yellow. Lightest age-toning to the map. Overall exceptionally clean. The linen reverse with very light soiling here and there. On one of the linen panels in a small neat ink hand, "Tirol." [sic] A Very Good Minus copy. One clue about the date of the map is that the Kingdom of Illyria [1816-1849] is clearly shown at lower right and conforms to known maps for the period. The kingdom, incidentally, appears to be designated, somewhat sentimentally, as Illyria-römisch. Another clue about the date of the map is that the lines of longitude do not conform to the Greenwich Prime Meridian. For example, Zurich should be approximately 47.4 North and 8.5 East [of the Prime Meridian]. However, according to this map, the longitude of Zurich is approximately 26 East. It follows that Paris would have a longitude of 20, using that system. In fact in 1634, Cardinal Richelieu used the westernmost island of the Canaries, Ferro, 19° 55' west of Paris, as the choice of meridian. Unfortunately, the geographer Delisle decided to round this off to 20°, so that it simply became the meridian of Paris disguised. As late as 1883 Austria and Germany were using Greenwich for sea charts but were using Ferol for land maps. This practice changed when in 1884, at the International Meridian Conference held in Washington, D.C., 22 countries voted to adopt the Greenwich meridian as the prime meridian of the world.