Original: It is believed to be a copy of a painting described by Pliny the Elder ( XXXV , 110 ) which had been painted by Philoxenus of Eretria for King Cassander of Macedon at the end of the 4th century BC , or even of a painting by Apelles contemporaneous with Alexander himself .
Simplified: It is believed to be a copy of a work described by Pliny the Elder ( XXXV , 110 ) which had been painted by Philoxenus of Eretria for King Cassander of Macedon at the end of the 4th century BC .