Nemes' ancestors traded in wool and tobacco in Transylvania since the 1830s, expanding into the timber and coal trade and financial transactions by the end of the 19th century.
[1][2] Marcell Nemes Magyarized his name, and was appointed a Royal Hungarian Councillor in 1903 due to his economic success and was ennobled as a Nobleman of Janoshalma in 1908.
[4] Nemes became one of the rediscoverers of El Greco by finding some of his paintings himself in Spain and adding them to his collection.
[5] His purchases were based on Julius Meier-Graefe's preliminary art-historical work and the assistance of Paris and Munich art dealers.
For example, he purchased Greco's Immaculate Conception and a Carrying of the Cross in the 1911 exhibition of old Spanish art organized by August Liebmann Mayer at the Heinemann Gallery in Munich.