Humboldt, Alexander von - Autograph Letter Signed 1812 _more Poster advertising a performance of

Poster advertising a performance of Parsifal

Argentine soprano (1896-1969)

unsigned photo shown as Klingsor in Parsifal

with Cornelis Dopper at the podium

shown in William Tell

Humboldt, Alexander von - Autograph Letter Signed 1812 _more Poster advertising a performance ofGerman geographer, naturalist and explorer (1769 1859), who made very significant contributions to several fields of science including botany, zoology and geophysics. After 5 years (from 1799 through 1804) of travelling through Latin America, Humboldt published a series of large volumes with valuable information, later was the first to propose that humans were changing the world climate. Autograph letter signed, to British writer Helen Maria Williams