Among the first towns where it was discovered in the twelfth and thirteenth centuries the existence of the paper, if you want to take for granted the information contained in notarial deeds discussing of the existence of paper products, while not specifying whether these were imported from other places and traded in the above-mentioned places, there were the territories of the Maritime Republics: Amalfi, Pisa, Genoa and Venice who had warehouses both in Syria, both on the coast of Palestine, where they were precisely located the major centres for the production of paper.
These republics also had intense trade relations with the East and they could learn from the Eastern art of making paper without too much difficulty, or it is possible that on board the galleys, which in medieval times shuttled between our coasts and the Holy Land to transport crusaders and merchandises, they are embarked "Magisters in art cartarum" which as skilled labour have introduced this type of work.
Amalfi is the oldest of the Maritime Republics, as early as the ninth century had its warehouses in Palermo and Messina and Syracuse, where the Amalfitana is still present in local place names. Age-old remains the question on the primacy of paper in Italy and then in Europe and in contention are mainly Amalfi and Fabriano.
https://www.livesalerno.com/paper-museum