The relevant reference from Book 8, chapter xliv states: aurum intexere in eadem Asia invenit Attalus rex, unde nomen Attalicis ('King Attalus, who also lived in Asia, invented the art of embroidering with gold, from which [these garments] have been called Attalic'). The capital of King Attalus was Pergamum. Asia here refers to what is now Northwest (Asian) Turkey.
This sentence should not be taken as fact. It represents information available to Pliny rather than actual historical events.
See also the TRC Needles entry on Phyrgian embroidery.
Digital source of illustration (retrieved 18 April 2017).
GVE