Analysis of information sources in references of the Wikipedia article "Wool" in English language version.
[...] the establishment at Pisa of a factory [...] which would export its cloths to the Crimea in exchange for Russian furs. [...] Portinari thought of making Pisa a wool centre for the Mediterranean, whence English wool might be dispatched to Florence, Genoa, and Milan for manufacture, and Spanish wool be manufactured in Pisa for export to the east