Chemical element of metals. Cu comes from Cuprum, Fe comes from Ferrum, Ag from Argentum. The symbols were not followed by a period (full stop) as with abbreviations. Later chemical elements were also assigned unique chemical symbols, based on the name of the element, but not necessarily in English. For example, sodium has the chemical symbol 'Na' after the Latin "natrium". The same applies to "W" (wolfram) for tungsten, "Fe" (ferrum) for iron, "Hg" (hydrargyrum) for mercury, "Sn" (stannum) for tin, "K" (kalium) for potassium, "Au" (aurum) for gold, "Ag" (argentum) for silver, "Pb" (plumbum) for lead, "Cu" (cuprum) for copper, and
Au-Haidhausen Au-Haidhausen Au-Haidhausen is the 5th borough of the German city of Munich, Bavaria. It is formed by the Au and Haidhausen districts. Au lies opposite the Altstadt of the city on the easterly plain tract of the Isar. Haidhausen is above Au on the Isar's uplands. Au-Haidhausen borders Bogenhausen to the north, Berg am Laim to the east, Obergiesing to the south, level with the flow of the Isar at Untergiesing, ending in the west at the river. Au and Haidhausen used to be hostel areas for trade workers and day labourers outside of the medieval town walls of Munich.