Abstract

The continuous substantial and flexible material support of the bankers Joseph and Alexander Mendelssohn were of essential importance for Alexander von Humboldt's outstanding scientific expeditions and his work as a publicist, coordinator and supporter of fellow scientist and scientific projects in Berlin for decades. New sources present this support of Humboldt by the Mendelssohns in all its depth and variety. At the same time, the enduring funding of one of Prussia's most important Bildungsbürger clearly illustrates that the business policy of the Mendelssohn bankers was based on a canon of values in which the acceptance of responsibility in different fields of society were of equal importance as pure economic success.